Publications

Current and previous direct student advisees are italicized
Refereed Journal Articles:
  1. Shan, A., B. Ramanujam, N. J. Podraza, and R. W. Collins, “Analysis of Non-Idealities in Rhomb Compensators,” Optics Express 29, 36328 (2021).
  2. Podraza, N. J., D. B. Saint John, M. M. Junda, and R. W. Collins, “Mean Free Path of Photoelectronic Excitations in Hydrogenated Amorphous Silicon and Silicon Germanium Alloy Semiconductors,” Physica Status Solidi b 258, 2000473 (2021).
  3. Razooqi Alaani, M. A., P. Koirala, A. B. Phillips, G. K. Liayange, R. A. Awni, D. R. Sapkota, B. Ramanujam, M. J. Heben, N. J. Podraza, and R. W. Collins, “Optical Properties of Magnesium-Zinc Oxide for Thin Film Photovoltaics,” Materials 14, 5649  (2021).
  4. Jayswal, N. K., S. Rijal, B. Subedi, I. Subedi, Z. Song, R. W. Collins, Y. Yan, and N. J. Podraza, “Optical Properties of Thin Film Sb2Se3 and Identification of its Electronic Losses in Photovoltaic Devices,” Solar Energy 228, 38 (2021).  Optical Properties Available:  Sb2Se3
  5. Hosseinian Ahangharnejhad, R., Z. Song, T. Mariam, J. Gardner, G. Liyange, Z. Almutawah, B. Anwar, M. Junda, N. J. Podraza, A. Phillips, Y. Yan, M. Heben, “Protecting Perovskite Solar Cells Against Moisture-Induced Degradation with Sputtered Inorganic Barrier Layers,” ACS Applied Energy Materials 4, 7571 (2021).
  6. Tumusange, M. S., B. Subedi, C. Chen, M. M. Junda, Z. Song, Y. Yan, and N. J. Podraza, “Impact of Humidity Temperature on the Stability of Optical Properties and Structure MAPbI3, MA0.7FA0.3PbI3, and (FAPbI3)0.95(MAPbBr3)0.05 Perovskite Thin Films,” Materials 14, 4054 (2021).
  7. Hensling, F. V. E., D. Dahiah, P. Dulal, P. Singleton, J. Sun, J. Schubert, H. Paik, I. Subedi, B. Subedi, G.-M. Rignanese, N. J. Podraza, G. Hautier, and D. G. Schlom, “Epitaxial Stannate Pyrochlore Thin Films:  Limitations of Cation Stoichiometry and Electron Doping,” APL Materials 9, 051113 (2021).
  8. Andrews, J., M. Beadoin, S. O’Leary, P. Koirala, B. Ramanujam, X. Tan, P. Pradhan, N. J. Podraza, and R. W. Collins, “The Impact of Processing on the Optical Absorption Onset of CdTe Thin-Films and Solar Cells,” Journal of Applied Physics 129, 165302 (2021).
  9. Subedi, B., Z. Song, C. Chen, C. Li, K. Ghimire, M. M. Junda, I. Subedi, Y. Yan, and N. J. Podraza, “Optical and Electronic Losses Arising from Physically Mixed Interfacial Layers in Perovskite Solar Cells,” ACS Applied Materials & Interfaces 13, 4923 (2021).
  10. Razooqi, M., P. Koirala, P. Pradhan, A. Phillips, N. J. Podraza, M. J. Heben, and R. W. Collins, “Tailoring the CdS/CdSe/CdTe Multilayer Structure for Optimization of Photovoltaics Device Performance Guided by Mapping Spectroscopic Ellipsometry,” Solar Energy Materials & Solar Cells 221, 110907 (2021).
  11. Khanal Subedi, K., A. B. Phillips, N. Shrestha, F. K. Alfadhili, A. Osella, I. Subedi, R. A. Awni, E. Bastola, Z. Song, S.-B. Li, R. W. Collins, Y. Yan, N. J. Podraza, M. J. Heben, and R. J. Ellingson, “Enabling Bifacial Thin Film Devics by Developing a Back Surface Field using CuxAlOy,” Nano Energy 83, 105827 (2021).
  12. Rajan, G., S. Karki, R. W. Collins, N. J. Podraza, and S. Marsillac, “Real Time Optimization of Anti-Reflective Coatings for CIGS Solar Cells,” Materials 13, 4259 (2020).
  13. Khanal Subedi, K., E. Bastola, I. Subedi, S. Bista, S. Rijal, A. B. Phillips, Y. Yan, M. J. Heben, N. J. Podraza, and R. J. Ellingson, “Semi-Transparent p-Type Barium Copper Sulfide as a Back Contact Interface Layer for Cadmium Telluride Solar Cells,” Solar Energy Materials & Solar Cells 218, 110764 (2020).
  14. Li, C., Z. Song, C. Chen, C. Xiao, B. Subedi, S. Harvey, N. Shrestha, K. Subedi, L. Chen, D. Liu, Y. Kim, C. Jiang, M. Heben, D. Zhao, R. Ellingson, N. J. Podraza, M. Al-Jassim, and Y. Yan, “Low-Bandgap Mixed Tin-Lead Iodide Perovskite with Reduced Methylammonium for Simultaneous Enhancement of Solar Cell Efficiency and Stability,” Nature Energy 5, 768 (2020).
  15. Subedi, I., T. J Silverman, M. C. Deceglie, and N. J. Podraza, “PERC Silicon PV Infrared to Ultraviolet Optical Model,” Solar Energy Materials & Solar Cells 215, 110655 (2020).
  16. Chae, I., D. Ngo, Z. Chen, A. L. Kwansa, X. Chen, A. B. Meddeb, N. J. Podraza, Y. G. Yingling, Z. Ounaies, and S. H. Kim, “Anisotropic Optical and Frictional Properties of Langmuir-Blodgett Film Consisting of Uniaxially-Aligned Rod-Shaped Cellulose Nanocrystals,” Advanced Materials Interfaces 7, 1902169 (2020).
  17. Smith, B., R. Xie, D. Adhikari, N. Podraza, and E. Gomez, “Characterization of Chain Alignment at Buried Interfaces using Mueller Matrix Spectroscopy,” MRS Communications 10, 292 (2020).
  18. Subedi, B., C. Li, M. M. Junda, Z. Song, Y. Yan, and N. J. Podraza, “Effects of Intrinsic and Atmospherically Induced Defects in Narrow Bandgap (FASnI3)x(MAPbI3)1-x Perovskite Films and Solar Cells,” Journal of Chemical Physics 152, 064705 (2020).
  19. Adhikari, D., M. M. Junda, E. Bastola, P. Koirala, R. J. Ellingson, R. W. Collins, and N. J. Podraza, “Glancing Angle Deposited CdTe:  Nanostructured Films and Impact on Solar Cell Performance,” Surface and Coatings Technology 381, 125127 (2020).  Optical Properties Available:  CdTe
  20. Uprety, P., I. Subedi, M. M. Junda, R. W. Collins, and N. J. Podraza, “Photogenerated Transport Properties in Silicon Photovoltaics,” Scientific Reports 9, 19015 (2019).
  21. Junda, M. M., C. Grice, Y. Yan, and N. J. Podraza, “Parametric Optical Property Database for CdSe1-xSx Alloys,” Electronic Materials Letters 15, 500 (2019).
  22. Kushner, D. I., A. Kusoglu, N. J. Podraza, and M. A. Hickner, “Substrate-Dependent Molecular and Nanostructural Orientation of Nafion Thin Films,” Advanced Functional Materials 29, 1902699 (2019).
  23. Adhikari, D., M. M. Junda, C. Grice, S. Marsillac, R. W. Collins, and N. J. Podraza, “n-i-p Hydrogenated Nanocrystalline Silicon Solar Cells with RF-Magnetron Sputtered Absorbers,” Materials 12, 1699 (2019).
  24. Junda, M. M., D. Zhao, B. Subedi, Y. Yan, and N. J. Podraza, “Atmospherically Induced Defects in (FASnI3)0.6(MAPbI3-3xCl3x)0.4 Perovskites,” Journal of Physics D:  Applied Physics 52, 175102 (2019).
  25. Hosseinian, R., A. B. Phillips, K. Ghimire, P. Koirala, Z. Song, H. M. Barudi, A. Habte, M. Sengupta, R. J. Ellingson, Y. Yan, R. W. Collins, N. J. Podraza, and M. J. Heben, “Irradiance and Temperature Considerations in the Design and Deployment of High Annual Energy Yield Perovskite / CIGS Tandems,” Sustainable Energy Fuels 3, 1841 (2019).
  26. Li, Chongwen, Z. Song, D. Zhao, C. Xiao, B. Subedi, M. M. Junda, C. Wang, C.-S. Jiang, M. Al-Jassim, N. J. Podraza, K. Zhu, and Y. Yan, “Reducing Saturation-Current Density to Realize High-Efficiency Low-Bandgap Mixed Tin-Lead Halide Perovskite Solar Cells,” Advanced Energy Materials 9, 1803135 (2019).
  27. Subedi, I., T. J. Silverman, M. G. Deceglie, and N. J. Podraza, “Emissivity of Solar Cell Cover Glass Calculated from Infrared Reflectance Measurements,” Solar Energy Materials & Solar Cells 190, 92 (2019).
  28. Zhao, D., C. Chen, C. Wang, M. M. Junda, Z. Song, C. R. Grice, Y. Yu, C. Li, B. Subedi, N. J. Podraza, X. Zhao, G. Fang, R.-G. Xiong, K. Zhu, and Y. Yan, “Efficient Two-Terminal All-Perovskite Tandem Solar Cells Enabled by High-Quality Low-Bandgap Absorber Layers,” Nature Energy 3, 1093 (2018).
  29. Uprety, P., C. Wang, P. Koirala, D. R. Sapkota, K. Ghimire, M. M. Junda, Y. Yan, R. W. Collins, and N. J. Podraza, “Optical Hall Effect of PV Device Materials,” IEEE Journal of Photovoltaics 8, 1793 (2018).
  30. Bastola, E., K. Bhandari, I. Subedi, N. J. Podraza, and R. Ellingson, “Earth-Abundant Chalcopyrite CuFeS2 Nanocrystals for Photovoltaics:  Structural, Optical, and Hole Transport Properties,” MRS Communications 8, 970 (2018).
  31. Subedi, B., L. Guan, Y. Yue, K. Ghimire, P. Uprety, Y. Yan, and N. J. Podraza, “Formamidinium + Cesium Lead Triiodide Perovskites:  Discrepancies between Thin Film Optical Absorption and Solar Cell Efficiency,” Solar Energy Materials & Solar Cells 188, 228 (2018).
  32. Subedi, K. K., E. Bastola, I. Subedi, Z. Song, K. P. Bhandari, A. B. Phillips, N. J. Podraza, M. J. Heben, R. Ellingson, “Nanocomposite (CuS)x(ZnS)1-x Thin Film Back Contact for CdTe Solar Cell:  Toward a Bifacial Device,” Solar Energy Materials & Solar Cells 186, 227 (2018).
  33. Ngo, D., H. Liu, N. Sheth, R. Lopez-Hallman, N. J. Podraza, M. Collin, S. Gin, and S. H. Kim, “Spectroscopic Ellipsometry Study of Thickness and Porosity of the Alteration Layer Formed at International Simple Glass (ISG) Surface in Aqueous Corrosion Conditions,” NPJ-Materials Degradation 2, 20 (2018).
  34. Junda, M. M., and N. J. Podraza, “Optical Properties of Soda Lime Float Glass from 3 mm to 148 nm (0.41 meV to 8.38 eV) by Spectroscopic Ellipsometry,” Surface Science Spectra 25, 016001 (2018).
  35. Pogrebnyakov, A. V., J. P. Turpin, J. D. Musgraves, H. J. Shin, J. A. Bossard, C. Rivero-Baleine, N. Podraza, K. A. Richardson, D. H. Werner, and T. S. Mayer, “Reconfigurable Near-IR Metasurface Based on Ge2Sb2Te5 Phase-Change Material,” Optical Materials Express 8, 2264 (2018).
  36. Uprety, P., M. M. Junda, H. Salmon, and N. J. Podraza, “Understanding Near Infrared Absorption in Tin Doped Indium Oxide Thin Films,” Journal of Physics D:  Applied Physics 51, 295302 (2018).
  37. Uprety, P., B. Macco, M. M. Junda, C. R. Grice, W. M. M. Kessels, and N. J. Podraza, “Optical and Electrical Properties of H-Doped ZnO Films Prepared by Atomic Layer Deposition Using Supercycles with Plasma-Treatment,” Materials Science in Semiconductor Processing 84, 91 (2018).
  38. Ibdah, A. A., P. Uprety, P. Aryal, P. Pradhan, M. J. Heben, N. J. Podraza, S. Marsillac, and R. W. Collins, “Optical Simulation of External Quantum Efficiency Spectra of CuIn1-xGaxSe2 Solar Cells from Spectroscopic Ellipsometry Inputs,” Journal of Energy Chemistry 27, 1151(2018).
  39. Pradhan, P., P. Aryal, D. Attygale, A. A. Ibdah, P. Koirala, J. Li, K. P. Bhandari, G. K. Liyanage, R. J. Ellingson, M. Heben, S. Marsillac, R. W. Collins, and N. J. Podraza, “Real Time Spectroscopic Ellipsometry Analysis of First Stage CuIn1-xGaxSe2 Growth:  Indium-Gallium Selenide Co-Evaporation,” Materials 11, 145 (2018).
  40. Silverman, T. J, M. G. Deceglie, I. Subedi, N. J. Podraza, I. M. Slauch, V. E. Ferry, and I. Repins, “Reducing Operating Temperature in Photovoltaic Modules,” IEEE Journal of Photovoltaics 8, 532 (2018).
  41. Szymanski, N., N. J. Podraza, T. Alderson, P. Sarin, and S. V. Khare, “Electronic and Optical Properties of Vanadium Oxides from First Principles,” Computational Materials Science 146, 310 (2018).
  42. Junda, M., L. Karki Gautam, R. W. Collins, and N. J. Podraza, “Optical Gradients in a-Si:H Thin Films Detected Using Real-Time Spectroscopic Ellipsometry with Virtual Interface Analysis,” Applied Surface Science 436, 779 (2018).
  43. Junda, M., A. Phillips, M. Heben, and N. J. Podraza, “Determination of the Role of Doping and Conductivity Anisotropy in Single Walled Carbon Nanotube Thin Films with THz Spectroscopic Ellipsometry,” Carbon 129, 592 (2018).
  44. Uprety, P., M. Junda, and N. J. Podraza, “Optical Properties of Borosilicate Glass from the Millimeter to Ultraviolet Wavelength Range,” Surface Science Spectra 24, 026003 (2017).
  45. Liu, Z. T. Y., N. J. Podraza, S. V. Khare, and P. Sarin, “Transparency Enhancement for SrVO3 by SrTiO3 Mixing:  A First-Principles Study,” Computational Materials Science 144, 139 (2017).
  46. Subedi, I., T. J Silverman, M. Deceglie, and N. J. Podraza, “Al+Si Interface Optical Properties obtained in the Si Solar Cell Configuration,” Physica Status Solidi a 214, 1700480 (2017).  Optical Properties Available:  Al, Al+Si
  47. Uprety, P., K. Lambright, M. M. Junda, C. R. Grice, D. M. Giolando, and N. J. Podraza, “Infrared to Ultraviolet Optical Properties of Low Temperature Processed SnO2:F,” Physica Status Solidi b 254, 1700102 (2017).
  48. Wang, C., C. Xiao, Y. Yu, D. Zho, R. A. Awni, C. R. Grice, K. Ghimire, D. Constantinou, W. Liao, A. J. Cimaroli, P. Liu, J. Chen, N. J. Podraza, C.-S. Jiang, M. M. Al-Jassim, X. Zhao, and Y. Yan, “Understanding and Eliminating Hysteresis for Highly Efficient Planar Perovskite Solar Cells,” Advanced Energy Materials 7, 1700414 (2017).
  49. Uprety, P., M. M. Junda, K. Ghimire, D. Adhikari, and N. J. Podraza, “Spectroscopic Ellipsometry Determination of Optical and Electrical Properties of Aluminum Doped Zinc Oxide,” Applied Surface Science 421, 852 (2017).
  50. Subedi, I., M. Slocum, D. Forbes, S. Hubbard, and N. J. Podraza,” Optical Properties of InP from Infrared to Vacuum Ultraviolet Studied by Spectroscopic Ellipsometry,” Applied Surface Science 421, 813 (2017).  Optical Properties Available:  Epitaxial InP (near IR to UV, IR), InP Surface Layer, InP:Fe Substrate
  51. Brakstad, T., B. R. Hope, M. Nematollahi, M. Kildemo, N. J. Podraza, K. Ghimire, and T. W. Reenaas, “Ellipsometric Study of the Optical Response of ZnS:Cr for PV Applications,”  Applied Surface Science 421, 315 (2017).
  52. Ibdah, A., P. Koirala, A. Ibdah, P. Aryal, P. Pradhan, S. Marsillac, A. A. Rockett, N. J. Podraza, and R. W. Collins, “Spectroscopic Ellipsometry for Analysis of Polycrystalline Thin-Film Photovoltaic Devices and Prediction of External Quantum Efficiency,” Applied Surface Science 421, 601 (2017).
  53. Adhikari, D., M. Junda, S. Marsillac, R. W. Collins, and N. J. Podraza, “Nanostructure Evolution of Magnetron Sputtered Hydrogenated Silicon Thin Films,” Journal of Applied Physics 122, 075302 (2017).
  54. Macco, B., J. Melskens, N. J. Podraza, K. Arts, C. Pugh, O. Thomas, and W. Kessels, “Correlating Silicon Surface Passivation to the Nanostructure of Low-Temperature a-Si:H After Rapid Thermal Annealing,” Journal of Applied Physics 122, 035302 (2017).
  55. Ghimire, K., D. Zhao, Y. Yan, and N. J. Podraza, “Optical Response of Mixed Methylammonium Lead Iodide and Formamidinium Tin Iodide Perovskite Thin Films,” AIP Advances 7, 075108 (2017).
  56. Itapu, S., D. Georgiev, P. Uprety, and N. J. Podraza, “Effect of Laser Irradiation on the Properties of Reactively Sputtered NiOx Thin Films,” Physica Status Solidi a 214, 1600414 (2017).
  57. Adhikari, D., M. M. Junda, P. Uprety, K. Ghimire, I. Subedi, and N. J. Podraza, “Near Infrared to Ultraviolet Optical Properties of Single Crystal SrLaAlO4 from Spectroscopic Ellipsometry,” Physica Status Solidi b 253, 2066 (2016).
  58. Liao, W., D. Zhao, Y. Yu, N. Shrestha, K. Ghimire, C. R. Grice, C. Wang, Y. Xiao, A. J. Cimaroli, R. J. Ellingson, N. J. Podraza, K. Zhu, R.-G. Xiong, and Y. Yan, “Fabrication of Efficient Low-Bandgap Perovskite Solar Cells by Combining Formamidinium Tin Iodide with Methylammonium Lead Iodide,” Journal of the American Chemical Society 138, 12360 (2016).
  59. Barnes, A., H. Haneef, D. G. Schlom, and N. J. Podraza, “Optical Band Gap and Infrared Phonon Modes of (La0.29Sr0.71)(Al0.65Ta0.36)O3 (LSAT) Single Crystal from Infrared to Ultraviolet Range Spectroscopic Ellipsometry,” Optical Materials Express 6, 3210 (2016).
  60. Ghimire, K., D. Zhao, A. Cimaroli, W. Ke, Y. Yan, and N. J. Podraza, “Optical Monitoring of CH3NH3PbI3 Thin Films Upon Atmospheric Exposure,” Journal of Physics D:  Applied Physics 49, 405102 (2016).
  61. Zhang, C., C. Pfeiffer, T. Jang, V. Ray, M. Junda, P. Uprety, N. Podraza, A. Grbic, and L. J. Guo, “Breaking Malus’ Law:  Highly Efficient, Broadband, and Angular Robust Asymmetric Light Transmitting Metasurface,” Laser & Photonics Reviews 10, 791-798 (2016).
  62. Junda, M. M., C. R. Grice, I. Subedi, Y. Yan, and N. J. Podraza, “Effects of Oxygen Partial Pressure, Deposition Temperature, and Annealing on the Optical Response of CdS:O Thin Films as Studied by Spectroscopic Ellipsometry,” Journal of Applied Physics 120, 015306 (2016).
  63. Aryal, P., A. Ibdah, P. Pradhan, D. Attygalle, P. Koirala, N. J. Podraza, S. Marsillac, R. W. Collins, and J. Li, “Parameterized Complex Dielectric Functions of CuIn1-xGaxSe2:  Applications in Optical Characterization of Compositional Non-Uniformities and Depth Profiles in Materials and Solar Cells,” Progress in Photovoltaics 24, 1200 (2016).
  64. Koirala, P., J. Li, X. Tan, H. Yoon, P. Aryal, P. Pradhan, A. Ibdah, S. Marsillac, A. A. Rockett, N. J. Podraza, and R. W. Collins, “Through-the-Glass Spectroscopic Ellipsometry for Analysis of the Optical Structure of CdTe Thin-Film Solar Cells in the Superstrate Configuration,” Progress in Photovoltaics 24, 1055 (2016).
  65. Karki Gautam, L., L. Ye, and N. J. Podraza, “LPCVD Thin Film Silicon Nitride,” Surface Science Spectra 23, 51 (2016).
  66. Subedi, I., K. Bhandari, R. Ellingson, and N. J. Podraza, “Near Infrared to Ultraviolet Optical Properties of Bulk Single Crystal and Nanocrystal Thin Film Iron Pyrite,” Nanotechnology 27, 295702 (2016).  Optical Properties Available:  Single Crystal FeS2, Nanocrystal Film FeS2
  67. Luo, J., H. He, N. J. Podraza, L. Qian, C. G. Pantano, and S. H. Kim, “Thermal Poling of Soda Lime Silica Glass with Nonblocking Electrodes—Part 1:  Effects of Sodium Ion Migration and Water Ingress on Glass Surface Structure,” Journal of the American Ceramic Society 99, 1221 (2016).
  68. Karki Gautam, L., M. M. Junda, H. F. Haneef, R. W. Collins, and N. J. Podraza, “Spectroscopic Ellipsometry Studies of n-i-p Hydrogenated Amorphous Silicon Based Photovoltaic Devices,” Materials 9, 128 (2016).
  69. Bharadwaja, S. S. N., A. Rajashekhar, S. W. Ko, W. Qu, M. Motyka, N. Podraza, T. Clark, C. A. Randall, and S. Trolier-McKinstry, “Excimer Laser Assisted Re-oxidation of BaTiO3 Thin Films on Ni Metal Foils,” Journal of Applied Physics 119, 024106 (2016).
  70. Zhang, L., Y. Zhou, L. Guo, W. Zhao, A. Barnes, H.-T. Zhang, C. Eaton, Y. Zheng, M. Brahlek, H. F. Haneef, N. J. Podraza, M. H. W. Chan, V. Gopalan, K. M. Rabe, R. Engel-Herbert, “Correlated Metals as Transparent Conductors,” Nature Materials 15, 204 (2016).
  71. Huang, Z., L. R. Dahal, M. M. Junda, P. Aryal, S. Marsillac, R. W. Collins, and N. J. Podraza, “Characterization of Structure and Growth Evolution for nc-Si:H in the Tandem Photovoltaic Device Configuration,” Journal of Photovoltaics 5, 1516 (2015).
  72. Ghimire, K., H. Haneef, R. W. Collins, and N. J. Podraza, “Optical Properties of Single Crystal Gd3Ga5O12 from the Infrared to Ultraviolet,” Physica Status Solidi b 252, 2191 (2015).
  73. Jin, Y. O., D. Saint John, N. J. Podraza, T. N. Jackson, and M. W. Horn, “High TCR Molybdenum Oxide and Nickel Oxide Thin Films for Microbolometer Applications,” Optical Engineering 54, 037101 (2015).
  74. Choi, S. G., J. Kang, J. Li, H. Haneef, N. J. Podraza, C. Beall, S.-H. Wei, and I. L. Repins, “Optical Function Spectra and Band-Gap Energy of Cu2SnSe3,” Applied Physics Letters 106, 043902 (2015).
  75. Junda, M. M., S. Ambalanath, P. Koirala, R. W. Collins, and N. J. Podraza, “Spectroscopic Ellipsometry Applied in the Full p-i-n a-Si:H Solar Cell Device Configuration,” Journal of Photovoltaics 5, 307 (2015).
  76. Karki Gautam, L., H. Haneef, M. M. Junda, D. B. Saint John, and N. J. Podraza, “Approach for Extracting Complex Dielectric Function Spectra in Weakly-Absorbing Regions,” Thin Solid Films 571, 548 (2014).
  77. Koirala, P., D. Attygalle, P. Aryal, P. Pradhan, J. Chen, S. Marsillac, A. S. Ferlauto, N. J. Podraza, and R. W. Collins, “Real Time Spectroscopic Ellipsometry for Analysis and Control of Thin Film Polycrystalline Semiconductor Deposition in Photovoltaics,” Thin Solid Films 571, 442 (2014).
  78. Pandey, A., B. Cai, N. Podraza, and D. A. Drabold, “Electrical Activity of Boron and Phosphorus in Hydrogenated Amorphous Silicon,” Physical Review Applied 2, 054005 (2014).
  79. Haneef, H., and N. J. Podraza, “Optical Properties of Single Crystal Bi4Ge3O12 from the Infrared to Ultraviolet,” Journal of Applied Physics 116, 163507 (2014).
  80. Dahal, L. R., J. Li, J. A. Stoke, Z. Huang, A. Shan, A. S. Ferlauto, C. R. Wronski, R. W. Collins, and N. J. Podraza, “Applications of Real-Time and Mapping Spectroscopic Ellipsometry for Process Development and Optimization in Hydrogenated Silicon Thin-Film Photovoltaics Technology,” Solar Energy Materials & Solar Cells 129, 32 (2014).
  81. Sallis, S., K. T. Butler, N. F. Quackenbush, D. S. Wiliams, M. Junda, D. A. Fischer, J. C. Woicik, N. J. Podraza, B. E. White Jr., A. Walsh, and L. F. J. Piper, “Origin of Deep Subgap States in Amorphous IGZO:  Chemically Disordered Coordination of Oxygen,” Applied Physics Letters 104, 232108 (2014).
  82. Aryal, P., P. Pradhan, D. Attygalle, A.R. A. Ibdah, K. Aryal, V. Ranjan, S. Marsillac, N. J. Podraza, and R. W. Collins, “Real-Time, In-Line, and Mapping Spectroscopic Ellipsometry for Applications in Cu(In1-xGax)Se2 Metrology,” Journal of Photovoltaics 4, 333 (2014).
  83. Shan, A., M. Fried, G. Juhasz, C. Major, O. Polgar, A. Nemeth, P. Petrik, L. R. Dahal, J. Chen, Z. Huang, N. J. Podraza, and R. W. Collins, “High-Speed Imaging / Mapping Spectroscopic Ellipsometry for In-Line Analysis of Roll-to-Roll Thin-Film Photovoltaics,” Journal of Photovoltaics 4, 355 (2014).
  84. Shin, Hang-Beum, D. Saint John, M.-Y. Lee, N. J. Podraza, and T. N. Jackson, “Electrical Properties of PECVD a-Si:H and a-Si1-xCx:H for Microbolometer Applications,” Journal of Applied Physics 114, 183705 (2013).
  85. Stoughton, S., M. Showak, Q. Mao, P. Koirala, D. A. Hillsberry, S. Sallis, L. F. Kourkoutis, L. F. J. Piper, D. A. Tenne, N. J. Podraza, D. A. Muller, C. Adamo, and D. G. Schlom, “Adsorption-Controlled Growth of BiVO4 by Molecular-Beam Epitaxy,” Applied Physics Letters Materials 1, 042112(2013).
  86. Podraza, N. J., W. Qui, B. B. Hinojosa, H. Xu, M. A. Motyka, S. R. Phillpot, J. E. Baciak, S. Trolier-McKinstry, and J. C. Nino, “Band Gap and Structure of Single Crystal BiI3:  Resolving Discrepancies in Literature,” Journal of Applied Physics 114, 033110 (2013).
  87. Haislmaier, R. C., N. J. Podraza, S. Denev, A. Melville, D. G. Schlom, and V. Gopalan, “Large Nonlinear Optical Coefficients in Pseudo-Tetragonal BiFeO3 Thin Films,” Applied Physics Letters 103, 031906 (2013).
  88. Banai, R. E., H. Lee, M. A. Motyka, R. Chandrasekharan, N. J. Podraza, J. R. S. Brownson, and M. W. Horn, “Optical Properties of Sputtered SnS Thin Films for Photovoltaic Absorbers,” Journal of Photovoltaics 3, 1084 (2013).
  89. Lee, C.-H., N. J. Podraza, Y. Zhu, R. F. Berger, S. Shen, M. Sestak, R. W. Collins, L. F. Kourkoutis, J. A. Mundy, H. Wang, Q. Mao, X. Xi, L. J. Brillson, J. B. Neaton, D. A. Muller, and D. G. Schlom, “Effect of Reduced Dimensionality on the Optical Band Gap of SrTiO3,” Applied Physics Letters 102, 122901 (2013).
  90. Dahal, L. R., Z. Huang, D. Attygalle, C. Salupo, N. J. Podraza, and R. W. Collins, “Correlations between Mapping Spectroscopic Ellipsometry Results and Solar Cell Performance for Evaluations of Non-Uniformity in Thin Film Silicon Photovoltaics,” Journal of Photovoltaics 3, 387 (2013).
  91. Attygalle, D., V. Ranjan, P. Aryal, P. Pradhan, S. Marsillac, N. J. Podraza, and R. W. Collins, “Optical Monitoring and Control of Cu(In1-xGax)Se2 by Three-Stage Co-Evaporation Using Real Time Spectroscopic Ellipsometry,” Journal of Photovoltaics 3, 375 (2013).
  92. Aryal, P., D. Attygalle, N. J. Podraza, S. Marsillac, and R. W. Collins, “Large Area Compositional Mapping of Cu(In1-xGax)Se2 Materials and Devices with Spectroscopic Ellipsometry,” Journal of Photovoltaics 3, 359 (2013).
  93. Yang, J. C., Q. He, S. J. Suresha, C. Y. Kuo, C. Y. Peng, R. C. Haislmaier, M. A. Motyka, G. Sheng, C. Adamo, H. J. Lin, Z. Hu, L. Chang, L. H. Tjeng, E. Arenholz, N. J. Podraza, M. Berghagen, R. Uecker, D. G. Schlom, V. Gopalan, L. Q. Chen, C. T. Chen, R. Ramesh, and Y. H. Chu, “Orthorhombic BiFeO3,” Physical Review Letters 109, 247606 (2012).
  94. Motyka, M. A., B. D. Gauntt, M. W. Horn, and N. J. Podraza, “Microstructural Evolution of Thin Film Vanadium Oxide Prepared by Pulsed-DC Magnetron Sputtering,” Journal of Applied Physics 112, 093504 (2012).
  95. Kim, S., M. A. Motyka, A. M. Palomino, and N. J. Podraza, “Conformal Effects of Absorbed Polymer on Swelling Behavior of Engineered Clay Soils,” Clays and Clay Minerals 60, 363 (2012).
  96. Ko, S. W., H. M. Schulze, D. Saint John, N. J. Podraza, and S. Trolier-McKinstry, “Low Temperature Crystallization of Metastable Nickel Manganite Spinel Thin Films,” Journal of the American Ceramic Society 95, 2562 (2012).
  97. Zurbuchen, M. A., N. J. Podraza, J. Schubert, Y. Jia, and D. G. Schlom, “Synthesis of the Superlattice Complex Oxide Sr5Bi4Ti8O27 and its Band Gap Behavior,” Applied Physics Letters 100, 223109 (2012).
  98. Podraza, N. J., B. D. Gauntt, M. A. Motyka, E. C. Dickey, and M. W. Horn, “Electrical and Optical Properties of Sputtered Amorphous Vanadium Oxide Thin Films,” Journal of Applied Physics 111, 073522 (2012).
  99. Shay, D., N. Podraza, N. Donnelly, and C. Randall, “High Energy Density, High Temperature Capacitors Utilizing Mn-Doped 0.8CaTiO3 – 0.2CaHfO3 Ceramics,” Journal of the American Ceramic Society 95, 1348 (2012).
  100. Collins, R. W., L. R. Dahal, N. J. Podraza, K. R. Kormanyos, and S. Marsillac, “Polarized Light Metrology for Thin Film Photovoltaics:  Manufacturing Scale Processes,” Photovoltaics International 13, 129 (2011).
  101. Saint John, D. B., H.-B. Shin, M.-Y. Lee, S. K. Ajmera, A. J. Syllaios, E. C. Dickey, T. N. Jackson, and N. J. Podraza, “Influence of Microstructure and Composition on Hydrogenated Silicon Thin Film Properties for Uncooled Microbolometer Applications,” Journal of Applied Physics 110, 033714 (2011).
  102. Desireddy, A., C. P. Joshi, M. Sestak, S. Little, S. Kumar, N. J. Podraza, S. Marsillac, R. W. Collins, and T. P. Bigioni, “Wafer-Scale Self-Assembled Plasmonic Thin Films,” Thin Solid Films 519, 6077 (2011).
  103. Podraza, N. J., D. B. Saint John, S. W. Ko, H. M. Schulze, J. Li, E. C. Dickey, and S. Trolier-McKinstry, “Optical Properties of Solution Deposited Nickel Manganite Thin Films,” Thin Solid Films 519, 2919 (2011).
  104. Dahal, R. L., D. Sainju, N. J. Podraza, S. Marsillac, and R. W. Collins, “Real Time Spectroscopic Ellipsometry of Ag/ZnO and Al/ZnO Interfaces for Back-Reflectors in Thin Film Si:H Photovoltaics,” Thin Solid Films 519, 2682 (2011).
  105. Ko, S. W., J. Li, N. J. Podraza, E. C. Dickey, and S. Trolier-McKinstry, “Nickel Manganite Thermistor Films Deposited by Spin Spray for Microbolometer Applications,” Journal of the American Ceramic Society 94, 516 (2011).
  106. Ray Sloppy, J. D., N. J. Podraza, E. C. Dickey, and D. D. MacDonald, “Complex Dielectric Functions of Anodic Bi-Layer Tantalum Oxide,” Electrochemica Acta 55, 8751 (2010).
  107. Kumar, A., R. Zeches, S. Denev, N. J. Podraza, A. Melville, D. Schlom, R. Ramesh, and V. Gopalan, “Probing Mixed Phases and Monoclinic Distortion in Strained Bismuth Ferrite Films by Optical Second Harmonic Generation,” Applied Physics Letters 97, 112903 (2010).
  108. Yoon, H. P., Y. Yuwen, G. D. Barber, N. J. Podraza, J. M. Redwing, T. E. Mallouk, C. R. Wronski, and T. S. Mayer, “High Aspect Ratio Silicon Solar Cells,” Applied Physics Letters 96, 213503 (2010).
  109. Chen, P., N. J. Podraza, X. S. Xu, A. Melville, E. Vlahos, V. Gopalan, R. Ramesh, D. G. Schlom, and J. L. Musfeldt, “Optical Properties of Quasi-Tetragonal BiFeO3 Thin Films,” Applied Physics Letters 96, 131907 (2010).
  110. Podraza, N. J., J. Li, C. R. Wronski, E. C. Dickey, and R. W. Collins, “Analysis and Control of Mixed-Phase Amorphous+Microcrystalline Silicon Thin Films by Real Time Spectroscopic Ellipsometry,” Journal of Vacuum Science and Technology A 27, 1255 (2009).
  111. Kryukov, Y. A., N. J. Podraza, R. Collins, and J. G. Amar, “Experimental and Theoretical Study of the Evolution of Surface Roughness in Amorphous Silicon Films Grown by Low-Temperature Plasma-Enhanced Chemical Vapor Deposition,” Physical Review B 80, 085403 (2009).
  112. Ramirez, M. O., A. Kumar, S. A. Denev, N. Podraza, X. Xu, R. C. Rai, Y-H. Chu, J. Seidel, L. Martin, S-Y. Yang, E. Saiz, J. F. Ihlefeld, S. Lee, J. Klug, S. W. Cheong, M. J. Bedzyk, O. Auciello, D. G. Schlom, R. Ramesh, J. Orenstein, J. L. Musfeldt, and V. Gopalan, “Magnon Sidebands and Spin-Charge Coupling in Bismuth Ferrite Probed by Nonlinear Optical Spectroscopy,” Physical Review B 79, 224106 (2009).
  113. Lee, J. H., X. Ke, N. J. Podraza, L. Fitting Kourkoutis, T. Heeg, M. Roeckerath, J. W. Freeland, C. J. Fennie, J. Schubert, D. A. Muller, P. Schiffer, and D. G. Schlom, “Optical Band Gap and Magnetic Properties of Unstrained EuTiO3 Grown by Molecular-Beam Epitaxy,” Applied Physics Letters 94, 212509 (2009).
  114. Ramirez, M. O., A. Kumar, S. A. Denev, Y-H. Chu, J. Seidel, L. W. Martin, S-Y. Yang, R. C. Rai, X. S. Xue, J. F. Ihlefeld, N. J. Podraza, E. Saiz, S. Lee, J. Klug, S. W. Cheong, M. J. Bedzyk, O. Auciello, D. G. Schlom, J. Orenstein, R. Ramesh, J. L. Musfeldt, and V. Gopalan, “Spin-Charge-Lattice Coupling through Resonant Multimagnon Excitations in Multiferroic BiFeO3,” Applied Physics Letters 94, 161905 (2009).
  115. Podraza, N. J., S. M. Pursel, C. Chen, M. W. Horn, and R. W. Collins, “Analysis of the Optical Properties and Structure of Serial Bi-Deposited TiO2 Sculptured Thin Films using Mueller Matrix Ellipsometry,” Journal of Nano-Photonics 2, 021930 (2008).
  116. Kumar, A., N. J. Podraza, S. Denev, J. Li, L. W. Martin, Y-H. Chu, R. Ramesh, R. W. Collins, and V. Gopalan, “Linear and Nonlinear Optical Properties of Multiferroic PbVO3 Thin Films,” Applied Physics Letters 92, 231915 (2008).
  117. Stoke, J. A., N. J. Podraza, J. Li, X. Cao, X. Deng, and R. W. Collins, “Advanced Deposition Phase Diagrams for Guiding Si:H-based Multijunction Solar Cells,” Journal of Non-Crystalline Solids 354, 2435 (2008).
  118. Cao, X., J. A. Stoke, J. Li, N. J. Podraza, W. Du, X. Yang, D. Attygalle, X. Liao, R. W. Collins, and X. Deng, “Fabrication and Optimization of Single-junction nc-Si:H n-i-p Solar Cells using Si:H Phase Diagram Concepts Developed by Real Time Spectroscopic Ellipsometry,” Journal of Non-Crystalline Solids 354, 2397 (2008).
  119. Ihlefeld, J. F., N. J. Podraza, Z. K. Liu, R. C. Rai, X. Xu, T. Heeg, Y. B. Chen, J. Li, R. W. Collins, J. L. Musfeldt, X. Q. Pan, J. Schubert, R. Ramesh, and D. G. Schlom, “Optical Band Gap of BiFeO3 Grown by Molecular-Beam Epitaxy,” Applied Physics Letters 92, 142908 (2008).
  120. Kumar, A., R. Rai, N. J. Podraza, S. Denev, M. Ramirez, Y-H. Chu, L. W. Martin, J. F. Ihlefeld, T. Heeg, J. Schubert, D. G. Schlom, J. Orenstein, R. Ramesh, R. W. Collins, J. L. Musfeldt, and V. Gopalan, “Linear and Nonlinear Optical Properties of BiFeO3,” Applied Physics Letters 92, 121915 (2008).
  121. Marsillac, S., N. Barreau, H. Khatri, J. Li, D. Sainju, A. Parikh, N. J. Podraza, and R. W. Collins, “Spectroscopic Ellipsometry Studies of In2S3 Top Window and Mo Back Contacts in Chalcopyrite Photovoltaics Technology,” Physica Status Solidi c 5, 1244 (2008).
  122. Li, J., N. J. Podraza, and R. W. Collins, “Real Time Spectroscopic Ellipsometry of Sputtered CdTe, CdS, and CdTe1-xSx Thin Films for Photovoltaic Applications,” Physica Status Solidi a 205, 901 (2008).
  123. Podraza, N. J., J. Li, C. R. Wronski, E. C. Dickey, M. W. Horn, and R. W. Collins, “Analysis of Si1-xGex:H Thin Films with Graded Composition and Structure by Real Time Spectroscopic Ellipsometry,” Physica Status Solidi a 205, 892 (2008).
  124. Pearce, J. M., N. Podraza, R. W. Collins, M. M. Al-Jassim, K. M. Jones, J. Deng, and C. R. Wronski, “Optimization of Open-Circuit Voltage in Amorphous Silicon Solar Cells with Mixed Phase Amorphous-Nanocrystalline P-Contacts,” Journal of Applied Physics 101, 114301 (2007).
  125. Podraza, N. J., C. R. Wronski, and R. W. Collins, “Deposition Phase Diagrams for Si1-xGex:H from Real Time Spectroscopic Ellipsometry,” Journal of Non-Crystalline Solids, 352, 1263 (2006).
  126. Podraza, N. J., C. R. Wronski, and R. W. Collins, “Model for the Amorphous Roughening Transition in Amorphous Semiconductor Deposition,” Journal of Non-Crystalline Solids 352, 950 (2006).
  127. Podraza, N. J., C. Chen, I. An, G. M. Ferreira, P. I. Rovira, R. Messier and R. W. Collins, “Analysis of the Optical Properties and Structure of Sculptured Thin Films from Spectroscopic Mueller Matrix Ellipsometry,” Thin Solid Films 455, 571 (2004).
  128. Chen, C., I. An, G. M. Ferreira, N. J. Podraza, J. A. Zapien and R. W. Collins, “Multichannel Mueller Matrix Ellipsometer based on the Dual Rotating Compensator Principle,” Thin Solid Films 455, 14 (2004).

Conference and Symposium Proceedings:
  1. Poster Presentation – Sapkota, D. R., P. Pradhan, R. Irving, C. R. Grice, A. B. Phillips, M. J. Heben, S. Marsillac, N. J. Podraza, and R. W. Collins, “Evaluation of CuInSe2 Materials and Solar Cells Co-evaporated at Different Rates Based on Real Time Spectroscopic Ellipsometry Calibrations,” Proceedings of the 48th Photovoltaic Specialists Conference, 451 (2021); presented by D. R. Sapkota at the IEEE 48th Photovoltaic Specialists Conference, Virtual Meeting, June 2021.
  2. Oral Presentation – Jayswal, N. K., D. Adhikari, I. Subedi, and N. J. Podraza, “Deposition Temperature Dependence of Optical and Structural Properties of Glancing Angle Deposited CdTe,” Proceedings of 64th Annual SVC Technical Conference (2021); presented by N. K. Jayswal at the 64th Annual SVC Technical Conference, Virtual Meeting, May 2021.
  3. Invited Oral Presentation – Subedi, I., B. Subedi, P. Uprety, M. M. Junda, D. Adhikari, K. Ghimire, P. Koirala, R. W. Collins, Y. Yan, and N. J. Podraza, “Non-Contacting Optical Probing of Photovoltaic Device Performance,” SPIE Proceedings:  Physics, Simulation, and Photonic Engineering of Photovoltaic Devices IX 11275, 11275J (2020); presented by N. J. Podraza at SPIE Physics, Simulation, and Photonic Engineering of Photovoltaic Devices IX in San Francisco, CA, February 2020.
  4. Oral Presentation – Uprety, P., C. Wang, P. Koirala, D. R. Sapkota, K. Ghimire, M. M. Junda, Y. Yan, R. W. Collins, and N. J. Podraza, “Transport Properties of Photovoltaic Devices via Optical Hall Effect,” Proceedings of 62nd Annual SVC Technical Conference (2019); presented by P. Uprety at the 62nd Annual SVC Technical Conference, Long Beach, CA, April 2019.
  5. Poster Presentation – Subedi, K., E. Bastola, I. Subedi, A. B. Phillips, M. J. Heben, N. J. Podraza, and R. J. Ellingson, “Bifacial CdS/CdTe Solar Cell using Transparent Barium Copper Sulfide as a Hole Transport Layer,” Proceedings of the 46th Photovoltaic Specialists Conference 185 (2019); presented by K. Subedi at the IEEE 46th Photovoltaic Specialists Conference, Chicago, IL, June 2019.
  6. Oral Presentation – Song, Z., D. Zhao, C. Chen, R. H. Ahangharnejhad, C. Li, K. Ghimire, N. J. Podraza, M. J. Heben, K. Zhu, and Y. Yan, “Monolithic Two-Terminal All-Perovskite Tandem Solar Cells with Power Conversion Efficiency Exceeding 21%,” Proceedings of the 46th Photovoltaic Specialists Conference 743 (2019); presented by Z. Song at the IEEE 46th Photovoltaic Specialists Conference, Chicago, IL, June 2019.
  7. Poster Presentation – Sapkota, D. R., P. Pradhan, P. Koirala, R. Irving, A. B. Phillips, R. J. Ellingson, M. J. Heben, S. Marsillac, N. J. Podraza, and R. W. Collins, “Structural and Optical Properties of Two-Stage CuInSe2 Thin Film Studied by Real Time Spectroscopic Ellipsometry,” Proceedings of the 46th Photovoltaic Specialists Conference 943 (2019); presented by D. R. Sapkota at the IEEE 46th Photovoltaic Specialists Conference, Chicago, IL, June 2019.
  8. Poster Presentation – Subedi, B., L. Guan, Y. Yu, K. Ghimire, P. Uprety, M. M. Junda, Y. Yan, and N. J. Podraza, “Formamidinium + Cesium Lead Triiodide Perovskite Thin Films:  Optical Properties and Devices,” Proceedings of the 7th World Conference on Photovoltaic Energy Conversion, 522 (2018); presented by M. M. Junda at the 7th World Conference on Photovoltaic Energy Conversion, Waikoloa, HI, June 2018.  Best poster award winner.
  9. Poster Presentation – Song, Z., C. Wang, D. Zhao, C. Chen, X. Yin, C. Li, N. J. Podraza, M. J. Heben, and Y. Yan, “Impact of Epoxy Encapsulation on Device Stability of Large-Area Laser-Patterned Perovskite Solar Cells,” Proceedings of the 7th World Conference on Photovoltaic Energy Conversion, 1139 (2018); presented by Z. Song at the 7th World Conference on Photovoltaic Energy Conversion, Waikoloa, HI, June 2018.  Best poster award winner.
  10. Poster Presentation – Junda, M. M., C. R. Grice, P. Uprety, P. Koirala, R. W. Collins, Y. Yan, and N. J. Podraza, “A Versatile Optical Model Applied to CdTe and CdSe1-yTey Alloys:  Sensitivity to Film Composition and Relative Defect Density,” Proceedings of the 7th World Conference on Photovoltaic Energy Conversion, 1902 (2018); presented by M. M. Junda at the 7th World Conference on Photovoltaic Energy Conversion, Waikoloa, HI, June 2018.
  11. Poster Presentation – Sapkota, D. R., P. Koirala, P. Pradhan, N. Shrestha, M. M. Junda, A. B. Phillips, R. J. Ellingson, M. J. Heben, S. Marsillac, N. J. Podraza, and R. W. Collins, “Spectroscopic Ellipsometry Investigations of CuInSe2 as a Narrow Bandgap Component of Thin Film Tandem Solar Cells,” Proceedings of the 7th World Conference on Photovoltaic Energy Conversion, 1943 (2018); presented by D. R. Sapkota at the 7th World Conference on Photovoltaic Energy Conversion, Waikoloa, HI, June 2018.
  12. Poster Presentation – Adhikari, D., P. Koirala, M. M. Junda, R. W. Collins, and N. J. Podraza, “Glancing Angle Deposited CdTe:  Optical Properties and Structure,” Proceedings of the 7th World Conference on Photovoltaic Energy Conversion, 3227 (2018); presented by M. M. Junda at the 7th World Conference on Photovoltaic Energy Conversion, Waikoloa, HI, June 2018.
  13. Poster Presentation – Subedi, I., T. Silverman, M. G. Deceglie, and N. J. Podraza, “Optical Evaluation of PERC Cell Reflectance for Thermal Management,” Proceedings of the 7th World Conference on Photovoltaic Energy Conversion, 3214 (2018); presented by N. J. Podraza at the 7th World Conference on Photovoltaic Energy Conversion, Waikoloa, HI, June 2018.
  14. Poster Presentation – Ghimire, K., D. Zhao, AC. Wang, Y. Yan, and N. J. Podraza, “Optical Evaluation of Perovskite Films in and for Solar Cell Device Structures,” Proceedings of the 44th Photovoltaic Specialists Conference, 993 (2017); presented by K. Ghimire at the IEEE 44th Photovoltaic Specialists Conference, Washington D.C., June 2017.  Best poster award winner.
  15. Poster Presentation – Subedi, I., T. J Silverman, M. Deceglie, and N. J. Podraza, “Impact of Infrared Optical Properties on Crystalline Si and Thin Film CdTe Solar Cells,” Proceedings of the 44th Photovoltaic Specialists Conference, 2771 (2017); presented by I. Subedi at the IEEE 44th Photovoltaic Specialists Conference, Washington D.C., June 2017.
  16. Poster Presentation – Adhikari, D., M. M. Junda, S. X. Marsillac, R. W. Collins, and N. J. Podraza, “Magnetron Sputtered Hydrogenated Silicon Thin Films:  Assessment for Application in Photovoltaics,” Proceedings of the 44th Photovoltaic Specialists Conference, 2582 (2017); presented by D. Adhikari at the IEEE 44th Photovoltaic Specialists Conference, Washington D.C., June 2017.
  17. Oral Presentation – Uprety, P., M. M. Junda, I. Subedi, M. A. Slocum, D. V. Forbes, S. M. Hubbard, and N. J. Podraza, “Electrical Transport Properties from Long Wavelength Ellipsometry,” Proceedings of the 44th Photovoltaic Specialists Conference, 3468 (2017); presented by P. Uprety at the IEEE 44th Photovoltaic Specialists Conference, Washington D.C., June 2017.
  18. Oral Presentation – Junda, M. M., C. R. Grice, P. Koirala, R. W. Collins, Y. Yan, and N. J. Podraza, “Optical Properties of CdSe1-xSx and CdSe1-yTey Alloys and Their Application for CdTe Photovoltaics,” Proceedings of the 44th Photovoltaic Specialists Conference, 3426 (2017); presented by M. Junda at the IEEE 44th Photovoltaic Specialists Conference, Washington D.C., June 2017.
  19. Poster Presentation – Razooqi, M. A., A. B. Phillips, G. K. Liyanage, F. K. Al-Fadhili, M. M. Junda, N. J. Podraza, M. J. Heben, R. W. Collins, and P. Koirala, “Applications of Mapping Spectroscopic Ellipsometry for CdSe/CdTe and CdS/CdSe/CdTe Solar Cells:  Optimization of Low-Temperature Processed Devices with All-Sputtered Semiconductors,” Proceedings of the 44th Photovoltaic Specialists Conference, 2462 (2017); presented by M. A. Razooqi at the IEEE 44th Photovoltaic Specialists Conference, Washington D.C., June 2017.
  20. Poster Presentation – Rajan, G., T. Miryala, S. Karki, R. W. Collins, N. J. Podraza, and S. X. Marsillac, “Influence of Deposition Parameters on Silicon Thin Films Deposited by Magnetron Sputtering,” Proceedings of the 44th Photovoltaic Specialists Conference, 2646 (2017); presented by G. Rajan at the IEEE 44th Photovoltaic Specialists Conference, Washington D.C., June 2017.
  21. Oral Presentation – Ghimire, K., D. Zhao, A. Cimaroli, W. Ke, M. Junda, Y. Yan, and N. J. Podraza, “Optical Properties and Degradation Monitoring of CH3NH3PbI3,” Proceedings of the 43rd Photovoltaic Specialists Conference, 89-94  (2016); presented by K. Ghimire at the IEEE 43rd Photovoltaic Specialists Conference, Portland, OR, June 2016.
  22. Oral Presentation – Ibdah, A.-R., P. Pradhan, P. Aryal, J. Li, N. J. Podraza, and R. W. Collins, “High Speed Mapping of Ga Compositional Profiles in CuIn1-xGaxSe2 Solar Cells by Spectroscopic Ellipsometry,” Proceedings of the 43rd Photovoltaic Specialists Conference, 3391-3395 (2016); presented by P. Pradhan at the IEEE 43rd Photovoltaic Specialists Conference, Portland, OR, June 2016.
  23. Poster Presentation – Ibdah, A.-R., P. Pradhan, P. Aryal, N. J. Podraza, S. Marsillac, and R. W. Collins, “CuIn1-xGaxSe2 Solar Cells with Thin Absorbers Analyzed by Spectroscopic Ellipsometry:  Insights into Quantum Efficiency and Optical/Collection Losses,” Proceedings of the 43rd Photovoltaic Specialists Conference, 2184-2187 (2016); presented by P. Pradhan at the IEEE 43rd Photovoltaic Specialists Conference, Portland, OR, June 2016.
  24. Poster Presentation – Rajan, G., T. Begou, K. Aryal, T. Ashrafee, S. Karki, V. Ranjan, A. A. Rockett, N. J. Podraza, R. W. Collins, and S. Marsillac, “Optimization of Multi-layered Anti-reflective Coatings for Ultra-thin Cu(In,Ga)Se2 Solar Cells,” Proceedings of the 43rd Photovoltaic Specialists Conference, 1506-1510 (2016); presented by G. Rajan at the IEEE 43rd Photovoltaic Specialists Conference, Portland, OR, June 2016.
  25. Oral Presentation – Ghimire, K., A. Cimaroli, F. Hong, T. Shi, N. J. Podraza, and Y. Yan “Spectroscopic Ellipsometry Studies of CH3NH3PbX3 Thin Films and their Growth Evolution,” Proceedings of the 42nd Photovoltaic Specialists Conference, 1-5 (2015); presented by N. J. Podraza at the IEEE 42nd Photovoltaic Specialists Conference, New Orleans, LA, June 2015.
  26. Oral Presentation – Li, J., P. Pradhan, P. Koirala, X. Tan, B. Sang, B. J. Stanbery, N. J. Podraza, and R. W. Collins “Through-the-Glass Spectroscopic Ellipsometry for Simultaneous Mapping of Coating Properties and Stress in the Glass,” Proceedings of the 42nd Photovoltaic Specialists Conference, 1-4 (2015); presented by P. Pradhan at the IEEE 42nd Photovoltaic Specialists Conference, New Orleans, LA, June 2015.
  27. Poster Presentation – Pradhan, P., P. Aryal, A.-R. Ibdah, P. Koirala, J. Li, N. J. Podraza, A. A. Rockett, S. Marsillac, and R. W. Collins “Effect of Molybdenum Deposition Temperature on the Performance of CuIn1-xGaxSe2 Solar Cells,” Proceedings of the 42nd Photovoltaic Specialists Conference, 1-4 (2015); presented by P. Pradhan at the IEEE 42nd Photovoltaic Specialists Conference, New Orleans, LA, June 2015.
  28. Poster Presentation – Aryal, P., P. Pradhan, Z. Huang, S. Marsillac, N. J. Podraza, and R. W. Collins “Quantum Efficiency Simulations with Inputs from Spectroscopic Ellipsometry for Evaluation of Carrier Collection in a-Si:H Solar Cells,” Proceedings of the 42nd Photovoltaic Specialists Conference, 1-4 (2015); presented by P. Pradhan at the IEEE 42nd Photovoltaic Specialists Conference, New Orleans, LA, June 2015.
  29. Poster Presentation – Koirala, P., X. Tan, J. Li, N. J. Podraza, S. Marsillac, A. Rockett, and R. W. Collins “Mapping Spectroscopic Ellipsometry of CdTe Solar Cell Processes:  Optimization of Cu Incorporation for Different CdS/CdTe Thicknesses,” Proceedings of the 40th Photovoltaic Specialists Conference, 674 (2014); presented by P. Koirala at the IEEE 40th Photovoltaic Specialists Conference, Denver, CO, June 2014.
  30. Oral Presentation – Pradhan, P., P. Aryal, A.-R. Ibdah, K. Aryal, J. Li, N. J. Podraza, S. Marsillac, and R. W. Collins “Real Time Spectroscopic Ellipsometry Analysis of the Three-Stages of CuIn1-xGaxSe2 co-Evaporation,” Proceedings of the 40th Photovoltaic Specialists Conference, 2060 (2014); presented by P. Pradhan at the IEEE 40th Photovoltaic Specialists Conference, Denver, CO, June 2014.
  31. Poster Presentation – Koirala, P., Z. Huang, X. Tan, M. Junda, N. J. Podraza, S. Marsillac, A. Rockett, and R. W. Collins “Doped a-Si1-xCx:H as a Novel Back Contact Material for CdTe Solar Cells,” Proceedings of the 40th Photovoltaic Specialists Conference, 2354 (2014); presented by P. Koirala at the IEEE 40th Photovoltaic Specialists Conference, Denver, CO, June 2014.
  32. Oral Presentation – Basantani, H., D. B. Saint John, N. J. Podraza, T. N. Jackson, and M. W. Horn, “Evaluation of 1/f Noise in Prospective IR Imaging Thin Films,” SPIE Proceedings:  Infrared Technology and Applications 9070, 9070IP (2014); presented by H. Basanti at the SPIE:  Defense, Security, and Sensing in Baltimore, MD, May 2014.
  33. Poster Presentation – Pradhan, P., D. Attygale, P. Aryal, N. J. Podraza, A. S. Ferlauto, S. Marsillac, and R. W. Collins, “Real Time Spectroscopic Ellipsometry of First Stage CuIn1-xGaxSe2:  Indium-Gallium Selenide co-Evaporation,” Proceedings of the 39th Photovoltaic Specialists Conference, 0414 (2013); presented by P. Aryal at the IEEE 39th Photovoltaic Specialists Conference, Tampa, FL, June 2013.
  34. Poster Presentation – Karki Gautam, L., and N. J. Podraza, “Growth Evolution of Si:H Prepared with SiH4 + Si2H6 as Studied by Real Time Spectroscopic Ellipsometry,” Proceedings of the 39th Photovoltaic Specialists Conference, 0605 (2013); presented by N. J. Podraza at the IEEE 39th Photovoltaic Specialists Conference, Tampa, FL, June 2013.
  35. Invited Oral Presentation – Collins, R. W., D. Attygalle, P. Aryal, P. Pradhan, A. R. A. Ibdah, N. J. Podraza, K. Aryal, V. Ranjan, and S. Marsillac, “Real Time, In-Line, and Mapping Spectroscopic Ellipsometry for Applications in CuIn1-xGaxSe2 Metrology,” Proceedings of the 39th Photovoltaic Specialists Conference, 1685 (2013); presented by R. W. Collins at the IEEE 39th Photovoltaic Specialists Conference, Tampa, FL, June 2013.
  36. Oral Presentation – Huang, Z., A. S. Ferlauto, N. J. Podraza, and R. W. Collins, “Optimization of a-Si:H p-i-n Solar Cells Through Development of n-layer Growth Evolution Diagram and Large Area Mapping,” Proceedings of the 39th Photovoltaic Specialists Conference, 1788 (2013); presented by R. W. Collins at the IEEE 39th Photovoltaic Specialists Conference, Tampa, FL, June 2013.
  37. Poster Presentation – Koirala, P., J. Chen, X. Tan, N. J. Podraza, S. Marsillac, A. A. Rockett, and R. W. Collins, “Multichannel Spectroscopic Ellipsometry for CdTe Photovoltaics:  From Real Time Monitoring to Large-Scale Mapping,” Proceedings of the 39th Photovoltaic Specialists Conference, 1987 (2013); presented by P. Koirala at the IEEE 39th Photovoltaic Specialists Conference, Tampa, FL, June 2013.
  38. Poster Presentation – Shen, H., Y. Yuwen, X. Wang, J. I. Ramirez, Y. V. Li, Y. Ke, C. E. Kendrick, N. J. Podraza, T. N. Jackson, E. C. Dickey, T. S. Mayer, and J. M. Redwing, “Effect of c-Si Doping Density on Heterojunction with Intrinsic Thin Layer (HIT) Radial Junction Solar Cells,” Proceedings of the 39th Photovoltaic Specialists Conference, 2466 (2013); presented by H. Shen at the IEEE 39th Photovoltaic Specialists Conference, Tampa, FL, June 2013.
  39. Oral Presentation – Saint John, D. B., H. Shen, H.-B. Shin, T. N. Jackson, and N. J. Podraza, “Infrared Dielectric Functions of Hydrogenated Amorphous Silicon Thin Films Determined by Spectroscopy Ellipsometry,” Proceedings of the 38th Photovoltaic Specialists Conference, 003112 (2012);  presented by D. B. Saint John at the IEEE 38th Photovoltaic Specialists Conference, Austin, TX, June 2012.
  40. Poster Presentation – Podraza, N. J., and D. B. Saint John, “Optical Characterization of Structurally Graded Si1-xGex:H Thin Films,” Proceedings of the 38th Photovoltaic Specialists Conference, 000354 (2012); presented by N. J. Podraza at the IEEE 38th Photovoltaic Specialists Conference, Austin, TX, June 2012.
  41. Poster Presentation – Banai, R., H. Lee, M. Lwinsohn, M. Motyka, R. Chandrasekharan, N. Podraza, J. R. S. Brownson, and M. Horn, “Investigation of the Absorption Properties of Sputtered Tin Monosulfide Thin Films for Photovoltaic Applications,” Proceedings of the 38th Photovoltaic Specialists Conference, 000164 (2012); presented by R. Banai at the IEEE 38th Photovoltaic Specialists Conference, Austin, TX, June 2012.
  42. Poster Presentation – Koirala, P., N. Paudel, J. Chen, P. Pradhan, D. Attygalle, Y. Yan, N. J. Podraza, and R. W. Collins, “Real Time and Post-Deposition Optical Analysis of Interfaces in CdTe Solar Cells,” Proceedings of the 38th Photovoltaic Specialists Conference, 000134 (2012);  presented by P. Koirala at the IEEE 38th Photovoltaic Specialists Conference, Austin, TX, June 2012.
  43. Poster Presentation – Khanal, R. R., A. B. Philips, Z. Huang, L. R. Dahal, N. Podraza, R. W. Collins, and M. J. Heben, “Hydrogenated Amorphous Silicon (a-Si:H) and Single Wall Carbon Nanotube (SWNT) Heterojunction Solar Cell,” Proceedings of the 38th Photovoltaic Specialists Conference, 000057 (2012); presented by R. R. Khanal at the IEEE 38th Photovoltaic Specialists Conference, Austin, TX, June 2012.
  44. Oral Presentation – Kim, S., A. M. Palomino, and N. J. Podraza, “Characterization of Absorbed Polymer Conformal Response Using Spectroscopic Ellipsometry,” ACSE Geo-Institute GeoCongress 2012, 1136 (2012); presented by S. Kim at the Geo-Institute’s 2012 Annual Congress, Oakland, CA, March 2012.
  45. Oral Presentation – Dahal, L. R., Z. Huang, C. Salupo, N. J. Podraza, S. Marsillac, and R. W. Collins, “Mapping Amorphous Silicon p-type Layers in Roll-to-Roll Deposition:  Toward Spatially Resolved PECVD Phase Diagrams,” Proceedings of the 37th Photovoltaic Specialists Conference, 000182 (2011); presented by L. R. Dahal at the IEEE 37th Photovoltaic Specialists Conference, Seattle, WA, June 2011.
  46. Poster Presentation – Yoon, H., Y. Yuwen, H. Shen, N. Podraza, T. Mallouk, E. Dickey, J. Redwing, C. Wronski, and T. Mayer, “Parametric Study of Micropillar Array Solar Cells,” Proceedings of the 37th Photovoltaic Specialists Conference, 000303 (2011); presented by H. Yoon at the IEEE 37th Photovoltaic Specialists Conference, Seattle, WA, June 2011.
  47. Invited Oral Presentation – Werner, D. H., T. S. Mayer, C. Rivero-Baleine, N. J. Podraza, K. Richardson, J. Turpin, A. Pogrebnyakov, J. D. Musgraves, J. A. Bossard, H. J. Shin, R. Muise, S. Rogers, and J. D. Johnson, “Adaptive Phase Change Metamaterials for Infrared Aperture Control,” SPIE Proceedings:  Optical Engineering + Applications 8165, 81651H (2011); presented by D. H. Werner at the SPIE:  Optics + Photonics in San Diego, CA, August 2011.
  48. Oral Presentation – Saint John, D. B., H.-B. Shin, M.-Y. Lee, E. C. Dickey, N. J. Podraza, and T. N. Jackson, “Thin Film Silicon and Germanium for Uncooled Microbolometer Applications,” SPIE Proceedings:  Infrared Technology and Applications 8012, 80123U (2011); presented by N. J. Podraza at the SPIE:  Defense, Security, and Sensing in Orlando, FL, April 2011.
  49. Oral Presentation – Gauntt, B. D., J. Li, O. M. Cabarcos, H. A. Basantani, C. Venkatrasubramanian, S. S. N. Bharadwaja, N. J. Podraza, T. N. Jackson, D. L. Allara, S. Antrazi, M. W. Horn, and E. C. Dickey, “Microstructure of Vanadium Oxide Used in Microbolometers,” SPIE Proceedings:  Infrared Technology and Applications 8012, 80123T (2011); presented by O. M. Cabarcos at the SPIE:  Defense, Security, and Sensing in Orlando, FL, April 2011.
  50. Oral Presentation - Podraza, N. J., D. Saint John, J. Li, C. R. Wronski, E. C. Dickey, and R. W. Collins, “Microstructural Evolution in Si1-xGex:H Thin Films for Photovoltaic Applications,” Proceedings of the 35th Photovoltaic Specialists Conference, 000158 (2010);  presented by N. J. Podraza at the IEEE 35th Photovoltaic Specialists Conference, Honolulu, HI, June 2010.
  51. Oral Presentation - Dahal, L. R., D. Sainju, J. Li, N. J. Podraza, M. N. Sestak, and R. W. Collins, “Comparison of Al/ZnO and Ag/ZnO Interfaces of Back-Reflectors for Thin Film Si:H Photovoltaics,” Proceedings of the 34th Photovoltaic Specialists Conference, 001702 (2009); Presented by L. R. Dahal at the IEEE 34th Photovoltaic Specialists Conference in Philadelphia, PA, May 2009.
  52. Oral Presentation - Dahal, L. R., D. Sainju, J. Li, J. A. Stoke, N. J. Podraza, X. Deng, and R. W. Collins, “Plasmonic Characteristics of Ag/ZnO Back-Reflectors for Thin Film Si Photovoltaics,” Proceedings of the 33rd Photovoltaic Specialists Conference, 502 (2008); presented by L. R. Dahal at the IEEE 33rd Photovoltaic Specialists Conference in San Diego, CA, May 2008.
  53. Oral Presentation - Stoke, J. A., L. R. Dahal, J. Li, N. J. Podraza, X. Cao, X. Deng, and R. W. Collins, “Optimization of Si:H Multijunction n-i-p Solar Cells through the Development of Deposition Phase Diagrams,” Proceedings of the 33rd Photovoltaic Specialists Conference, 762 (2008); presented by J. A. Stoke at the IEEE 33rd Photovoltaic Specialists Conference in San Diego, CA, May 2008.
  54. Oral Presentation - Podraza, N. J., J. Li, C. R. Wronski, M. W. Horn, E. C. Dickey and R. W. Collins, “Analysis of Compositionally and Structurally Graded Si:H and Si1-xGex:H by Real Time Spectroscopic Ellipsometry,” Materials Research Society Symposia Proceedings 1066, A.10.1.1 (2008); presented by N. J. Podraza at the 2008 Materials Research Society Spring Meeting in San Francisco, CA, March 2008.
  55. Invited Oral Presentation - Li, J., J. A. Stoke, N. J. Podraza, D. Sainju, A. Parikh, X. Cao, H. Khatri, N. Barreau, S. Marsillac, X. Deng, and R. W. Collins, “Analysis and Optimization of Thin Film Photovoltaic Materials and Device Fabrication by Real Time Spectroscopic Ellipsometry,” SPIE Proceedings:  Photovoltaic Cell and Module Technologies 6651, 665107 (2007); presented by R. W. Collins at the SPIE:  Optics + Photonics in San Diego, CA, August 2007.
  56. Oral Presentation - Stoke, J. A., N. J. Podraza, J. Li, X. Cao, X. Deng, and R. W. Collins, “Advanced Deposition Phase Diagrams for Guiding Si:H-based Multijunction Solar Cells,” Materials Research Society Symposia Proceedings 989, A.15.2.1 (2007); presented by R. W. Collins at the 2007 Materials Research Society Spring Meeting in San Francisco, CA, April 2007.
  57. Oral Presentation - Sainju, D., P. J. van den Oever, N. J. Podraza, M. Syed, J. A. Stoke, J. Chen, X. Yang, X. Deng, and R. W. Collins, “Origin of Optical Losses in Ag/ZnO Back-Reflectors for Thin Film Si Photovoltaics,” Proceedings of the 4th World Conference on Photovoltaic Energy Conversion, 1732 (2006); presented by R. W. Collins at the IEEE 4th World Conference on Photovoltaic Energy Conversion in Waikoloa, HI, May 2006.
  58. Poster Presentation - Podraza, N. J., C. R. Wronski, M. W. Horn, and R. W. Collins, “Roughness and Phase Evolution in Si1-xGex:H:  Guidance for Multijunction Photovoltaics,” Proceedings of the 4th World Conference on Photovoltaic Energy Conversion, 1657 (2006); presented by N. J. Podraza at the IEEE 4th World Conference on Photovoltaic Energy Conversion in Waikoloa, HI, May 2006.
  59. Poster Presentation - Chen, J., J. Li, D. Sainju, K. D. Wells, N. J. Podraza, and R. W. Collins, “Multilayer Analysis of the CdTe Solar Cell Structure by Spectroscopic Ellipsometry,” Proceedings of the 4th World Conference on Photovoltaic Energy Conversion, 475 (2006); presented by J. Li at the IEEE 4th World Conference on Photovoltaic Energy Conversion in Waikoloa HI, May 2006.
  60. Oral Presentation - Li, J., J. Chen, N. J. Podraza, and R. W. Collins, “Real Time Spectroscopic Ellipsometry of Sputtered CdTe:  Effect of Growth Temperature on Structural and Optical Properties,” Proceedings of the 4th World Conference on Photovoltaic Energy Conversion, 392 (2006); presented by J. Li at the IEEE 4th World Conference on Photovoltaic Energy Conversion in Waikoloa HI, May 2006.
  61. Oral Presentation - Podraza, N. J., C. R. Wronski, M. W. Horn, and R. W. Collins, “Surface Roughening Transitions in Si1-xGex:H Thin Films,” Materials Research Society Symposia Proceedings 910, A.03.2.1 (2006); presented by N. J. Podraza at the 2006 Materials Research Society Spring Meeting in San Francisco, CA, April 2006.
  62. Poster Presentation - Podraza, N. J., C. R. Wronski, M. W. Horn, and R. W. Collins, “Dielectric functions of a-Si1-xGex:H vs. Ge content, Temperature, and Processing:  Advances in Optical Function Parameterization,” Materials Research Society Symposia Proceedings 910, A.10.1.1 (2006); presented by N.J. Podraza at the 2006 Materials Research Society Spring Meeting in San Francisco, CA, April 2006.
  63. Poster Presentation - Podraza, N. J., C. Chen, D. Sainju, O. Ezekoye, M. W. Horn, C. R. Wronski, and R. W. Collins, “Transparent Conducting Oxide Sculptured Thin Films for Photovoltaic Applications,” Materials Research Society Symposia Proceedings 865, F.7.1.1 (2005); presented by N. J. Podraza at the 2005 Materials Research Society Spring Meeting in San Francisco, CA, April 2005.
  64. Oral Presentation - Li, J., J. Chen, J. A. Zapien, N. J. Podraza, C. Chen, J. Drayton, A. Vasko, A. Gupta, S. L. Wang, R. W. Collins, and A. D. Compaan, “Real Time Analysis of Magnetron-Sputtered Thin-Film CdTe by Multichannel Spectroscopic Ellipsometry,” Materials Research Society Symposia Proceedings 865, F.1.2.1 (2005); presented by J. Li at the 2005 Materials Research Society Spring Meeting in San Francisco, CA, April 2005.
  65. Oral Presentation - Podraza, N. J., G. M. Ferreira, C. R. Wronski, and R. W. Collins, “Development of Deposition Phase Diagrams for Thin Film Si:H and Si1-xGex:H Using Real Time Spectroscopic Ellipsometry,” Materials Research Society Symposia Proceedings 862, A.16.3.1 (2005); presented by N. J. Podraza at the 2005 Materials Research Society Spring Meeting in San Francisco, CA, April 2005.
  66. Oral Presentation - Chen, C., C. Ross, N. J. Podraza, C. R. Wronski, and R. W. Collins, “Multichannel Mueller Matrix Analysis of the Evolution of Microscopic Roughness and Texture during ZnO:Al Chemical Etching,” Proceedings of the 31st Photovoltaic Specialists Conference, 1524 (2005); presented by C. Chen at the IEEE 31st Photovoltaic Specialists Conference in Orlando, FL, January 2005. 
  67. Oral Presentation - Podraza, N. J., C. Chen, J. M. Flores, D. Sainju, I. An, G. M. Ferreira, C. R. Wronski, M. W. Horn, R. Messier, and R. W. Collins, “Optical Properties of Transparent Conducting Oxide Sculptured Thin Films for Applications in Thin Film Silicon Photovoltaics,” Proceedings of the 31st Photovoltaic Specialists Conference, 1428 (2005); presented by C. Chen at the IEEE 31st Photovoltaic Specialists Conference in Orlando, FL, January 2005.
  68. Oral Presentation - Podraza, N. J., G. M. Ferreira, M. L. Albert, C. Chen, C. R. Wronski, and R. W. Collins, “Real Time Spectroscopic Ellipsometry of Thin Film Si1-xGex:H:  Phase Diagrams for Optimization in Photovoltaics Applications,” Proceedings of the 31st Photovoltaic Specialists Conference, 1393 (2005); presented by N. J. Podraza at the IEEE 31st Photovoltaic Specialists Conference in Orlando, FL, January 2005.
  69. Oral Presentation - Zapien, J. A, J. Chen, J. Li, J. Inks, N. J. Podraza, C. Chen, J. Drayton, A. Vasko, A. Gupta, S. L. Wang, R. W. Collins, and A. D. Compaan, “Real Time Spectroscopic Ellipsometry of Thin Film CdTe Deposition by Magnetron Sputtering for Photovoltaic Applications,” Proceedings of the 31st Photovoltaic Specialists Conference, 461 (2005); presented by R. W. Collins at the IEEE 31st Photovoltaic Specialists Conference in Orlando, FL, January 2005.

Encyclopedia and Magazine Articles:
  1. Subedi, B., J. Zuo, M. S. Tumusange, M. M. Junda, K. Ghimire, and N. J. Podraza, “Roles of Center Cations,” Hybrid Perovskite Solar Cells: Characteristics and Operation (Wiley-VCH) ed. H. Fujiwara, 253 (2021).
  2. Podraza, N. J., and R. W. Collins, “Film Growth and Evolution of Structure,” Structure, Properties, and Applications of Tetrahedrally-Bonded Thin-Film Amorphous Semiconductors (World Scientific) eds. R. W. Collins and N. J. Podraza, 1 (2021).
  3. Melskens, J., N. J. Podraza, and M. Stuckelberger, “Infrared Optical Properties:  Hydrogen Bonding and Stability,” Structure, Properties, and Applications of Tetrahedrally-Bonded Thin-Film Amorphous Semiconductors (World Scientific) eds. R. W. Collins and N. J. Podraza, 85 (2021).
  4. Collins, R. W., P, Koirala, and N. J. Podraza, “Near-Infrared to Ultraviolet Optical Response and the Absorption Onset:  Parametric Representations,” Structure, Properties, and Applications of Tetrahedrally-Bonded Thin-Film Amorphous Semiconductors (World Scientific) eds. R. W. Collins and N. J. Podraza, 129 (2021).
  5. Adhikari, D., M. M. Junda, B. Ramanujam, P. Koirala, N. J. Podraza, and R. W. Collins, “Film Growth and Evolution of Structure,” Structure, Properties, and Applications of Tetrahedrally-Bonded Thin-Film Amorphous Semiconductors (World Scientific) eds. R. W. Collins and N. J. Podraza, 167 (2021).
  6. Podraza, N. J., and R. W. Collins, “Growth and Properties of Tetrahedrally-Bonded Thin-Film Amorphous Semiconductor Alloys,” Structure, Properties, and Applications of Tetrahedrally-Bonded Thin-Film Amorphous Semiconductors (World Scientific) eds. R. W. Collins and N. J. Podraza, 247 (2021).
  7. Koirala, P., J. A. Stoke, N. J. Podraza, and R. W. Collins, “Materials and Device Characterization by Optical Probes,” Structure, Properties, and Applications of Tetrahedrally-Bonded Thin-Film Amorphous Semiconductors (World Scientific) eds. R. W. Collins and N. J. Podraza, 279 (2021).
  8. Huang, Z., L. R. Dahal, P. Koirala, W. Du, S. Cao, X. Deng, N. J. Podraza, and R. W. Collins, “Ex-situ Analysis of Multijunction Solar Cells Based on Hydrogenated Amorphous Silicon,” Spectroscopic Ellipsometry for Photovoltaics Vol. 1 (Springer) eds. H. Fujiwara and R. W. Collins, 175 (2018).
  9. Ibdah, A.-R. A., P. Aryal, P. Pradhan, S. Marsillac, N. J. Podraza, and R. W. Collins, “Real Time and In-Situ Spectroscopic Ellipsometry of CuyIn1-xGaxSe2 for Complex Dielectric Function Determination and Parameterization,” Spectroscopic Ellipsometry for Photovoltaics Vol. 1 (Springer) eds. H. Fujiwara and R. W. Collins, 281 (2018).
  10. Koirala, P., J. Li, N. J. Podraza, and R. W. Collins, “Real Time and Mapping Spectroscopic Ellipsometry for CdTe Photovoltaics,” Spectroscopic Ellipsometry for Photovoltaics Vol. 1 (Springer) eds. H. Fujiwara and R. W. Collins, 357 (2018).
  11. Podraza, N. J., “High Efficiency III-V Solar Cells,” Spectroscopic Ellipsometry for Photovoltaics Vol. 1 (Springer) eds. H. Fujiwara and R. W. Collins, 415 (2018).
  12. Fujiwara, H., N. J. Podraza, M. I. Alonso, M. Kato, K. Ghimire, T. Miyadera, and M. Chikamatsu, “Organic-Inorganic Hybrid Perovskite Solar Cells,” Spectroscopic Ellipsometry for Photovoltaics Vol. 1 (Springer) eds. H. Fujiwara and R. W. Collins, 463 (2018).
  13. Koirala, P., A.-R. A. Ibdah, P. Aryal, P. Pradhan, Z. Huang, N. J. Podraza, S. Marsillac, and R. W. Collins, “Optical Simulation of External Quantum Efficiency Spectra,” Spectroscopic Ellipsometry for Photovoltaics Vol. 2 (Springer) eds. H. Fujiwara and R. W. Collins, 83 (2018).
  14. Shan, A., J. Chen, P. Koirala, K. R. Kormanyos, N. J. Podraza, and R. W. Collins, “On-Line Monitoring of Photovoltaics Production,” Spectroscopic Ellipsometry for Photovoltaics Vol. 2 (Springer) eds. H. Fujiwara and R. W. Collins, 169 (2018).
  15. Pradhan, P., A.-R. A. Ibdah, P. Aryal, D. Attygalle, N. J. Podraza, S. Marsillac, and R. W. Collins, “Real Time Measurement, Monitoring, and Control of CuIn1-xGaxSe2 by Spectroscopic Ellipsometry,” Spectroscopic Ellipsometry for Photovoltaics Vol. 2 (Springer), 209 (2018).
  16. Huang, Z., L. R. Dahal, S. Marsillac, N. J. Podraza, and R. W. Collins, “Real Time and Mapping Spectroscopic Ellipsometry of Hydrogenated Amorphous and Nanocrystalline Si Solar Cells,” Spectroscopic Ellipsometry for Photovoltaics Vol. 2 (Springer) eds. H. Fujiwara and R. W. Collins, 255 (2018).
  17. Podraza, N. J., and M. R. Linford, “Archiving the Optical Constants of Materials with Surface Science Spectra,” Vacuum Technology & Coating October, 2 (2017).    
  18. Li, J., R. W. Collins, M. N. Sestak, N. J. Podraza, S. Marsillac, and A. Rockett, “Spectroscopic Ellipsometry,” Advanced Characterization Techniques for Thin Film Solar Cells 2nd Edition (Wiley), 2016.
  19. Cushman, C. V., N. Smith, M. Kaykhaii, N. J. Podraza, and M. R. Linford, “An Introduction to Modeling in Spectroscopic Ellipsometry, Focusing on Models for Transparent Materials:  The Cauchy and Sellmeier Models,” Vacuum Technology & Coating July, 2 (2016).
  20. Podraza, N. J. and G. E. Jellison Jr, “Ellipsometry,” Reference Module in Chemistry, Molecular Sciences and Engineering (Elsevier), 2014.
  21. Podraza, N. J. and B. H. Billings, “Crystal Optics,” Encyclopedia of Science and Technology 11th Edition  (McGraw Hill), 2012.
  22. Podraza, N. J., “Dichroism,” Encyclopedia of Science and Technology 11th Edition (McGraw Hill), 2012.
  23. Podraza, N. J., “Birefringence,” in Encyclopedia of Science and Technology 11th Edition (McGraw Hill), 2012.