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Publications
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Journal Articles
M. M. Junda, C. R. Grice, Y. Yan, and N. J. Podraza, "Parametric optical property database for CdSe1-xSx alloys," accepted for publication in Electron. Mater. Lett. (2019).
M. M. Junda, D. Zhao, B. Subedi, C. Wang, C. Chen, Y. Yan, and N. J. Podraza, "Atmospherically induced defects in (FASnI3)0.6(MAPbI3-3xCl3x)0.4 perovskites," J. Phys. D: Appl. Phys. 52, 175102 (2019).
C. Li, Z. Song, D. Zhao, C. Xiao, B. Subedi, N. Shrestha, M. M. Junda, C. Wang, C.-S. Jiang, M. Al-Jassim, R. J. Ellingson, 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," Adv. Energy Mater., accepted (2018).
D. Zhao, 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, accepted (2018).
P. Uprety, 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 J. Photovolt. 6, 1793 (2018).
P. Uprety, M. M. Junda, H. Salmon, and N. J. Podraza, "Understanding near infrared absorption in tin doped indium oxide thin films," J. Phys. D: Appl. Phys. 51, 295302 (2018).
P. Uprety, B. Macco, M. M. Junda, C. R. Grice, W. M. M. Kessels, and N. J. Podraza, "Optical and electrical properties of H2 plasma-treated ZnO films prepared by atomic layer deposition using supercycles," Mater. Sci. Semicond. Process. 84, 91-100 (2018).
M. M. Junda, 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," Surf. Sci. Spectra 25, 016001 (2018).
M. M. Junda, Adam B. Phillips, Rajendra R. Khanal, Michael J. Heben, and Nikolas J. Podraza, "Determination of conductivity anisotropy and the role of doping in single walled carbon nanotube thin films with THz spectroscopic ellipsometry," Carbon 129, 592-597 (2018).
M. M. Junda, Laxmi Karki Gautam, Robert W. Collins, and Nikolas J. Podraza, "Optical gradients in a-Si:H thin films detected using real-time spectroscopic ellipsometry with virtual interface analysis," Appl. Surf. Sci. 436, 779-784 (2018).
P. Uprety, M. M. Junda, and N. J. Podraza, "Optical properties of borosilicate glass from 3.1 mm to 210 nm (0.4 meV to 5.89 eV) by spectroscopic ellipsometry," Surf. Sci. Spectra 24, 026003 (2017).
D. Adhikari, M. M. Junda, S. X. Marsillac, R. W. Collins, and N. J. Podraza, "Nanostructure evolution of magnetron sputtered hydrogenated silicon thin films," J. Appl. Phys. 122, 075302 (2017).
P. Uprety, K. Lambright, C. R. Grice, M. M. Junda, D. M. Giolando, and N. J. Podraza, "Morphological and optical properties of low temperature processed SnO2:F," Phys. Status Solidi B 254, 1700102 (2017).
P. Uprety, M. M. Junda, K. Ghimire, D. Adhikari, and N. J. Podraza, “Spectroscopic ellipsometry determination of optical and electrical properties of aluminum doped zinc oxide,” Appl. Surf. Sci. 421, 852-858 (2017).
D. Adhikari, M. M. Junda, P. Uprety, K. Ghimire, I. Subedi, and N. J. Podraza, “Near infrared to ultraviolet anisotropic optical properties of single crystal SrLaAlO4 from spectroscopic ellipsometry,” Phys. Stat. Sol. B 253, 2066 (2016).
C. Zhang, 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 Photon. Rev. 10, 791 (2016).
M. M. Junda, 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 studied by spectroscopic ellipsometry,” J. Appl. Phys. 120, 015306 (2016).
L. Karki Gautam, 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).
Z. Huang, 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,” IEEE J. Photovolt. 5, 1516 (2015).
M. M. Junda, A. Shan, 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,” IEEE J. Photovolt. 5, no. 1, 307-312 (2015).
L. Karki Gautam, H. Haneef, M. M. Junda, D. B. Saint John, N. J. Podraza, “Approach for extracting complex dielectric function spectra in weakly-absorbing regions,” Thin Solid Films 571, no. 1, 548-553 (2014).
S. Sallis, K. T. Butler, N. F. Quackenbush, D. S. Williams, 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,” Appl. Phys. Lett. 104, 232108, (2014).
M. M. Junda, D. Zhao, B. Subedi, C. Wang, C. Chen, Y. Yan, and N. J. Podraza, "Atmospherically induced defects in (FASnI3)0.6(MAPbI3-3xCl3x)0.4 perovskites," J. Phys. D: Appl. Phys. 52, 175102 (2019).
C. Li, Z. Song, D. Zhao, C. Xiao, B. Subedi, N. Shrestha, M. M. Junda, C. Wang, C.-S. Jiang, M. Al-Jassim, R. J. Ellingson, 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," Adv. Energy Mater., accepted (2018).
D. Zhao, 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, accepted (2018).
P. Uprety, 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 J. Photovolt. 6, 1793 (2018).
P. Uprety, M. M. Junda, H. Salmon, and N. J. Podraza, "Understanding near infrared absorption in tin doped indium oxide thin films," J. Phys. D: Appl. Phys. 51, 295302 (2018).
P. Uprety, B. Macco, M. M. Junda, C. R. Grice, W. M. M. Kessels, and N. J. Podraza, "Optical and electrical properties of H2 plasma-treated ZnO films prepared by atomic layer deposition using supercycles," Mater. Sci. Semicond. Process. 84, 91-100 (2018).
M. M. Junda, 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," Surf. Sci. Spectra 25, 016001 (2018).
M. M. Junda, Adam B. Phillips, Rajendra R. Khanal, Michael J. Heben, and Nikolas J. Podraza, "Determination of conductivity anisotropy and the role of doping in single walled carbon nanotube thin films with THz spectroscopic ellipsometry," Carbon 129, 592-597 (2018).
M. M. Junda, Laxmi Karki Gautam, Robert W. Collins, and Nikolas J. Podraza, "Optical gradients in a-Si:H thin films detected using real-time spectroscopic ellipsometry with virtual interface analysis," Appl. Surf. Sci. 436, 779-784 (2018).
P. Uprety, M. M. Junda, and N. J. Podraza, "Optical properties of borosilicate glass from 3.1 mm to 210 nm (0.4 meV to 5.89 eV) by spectroscopic ellipsometry," Surf. Sci. Spectra 24, 026003 (2017).
D. Adhikari, M. M. Junda, S. X. Marsillac, R. W. Collins, and N. J. Podraza, "Nanostructure evolution of magnetron sputtered hydrogenated silicon thin films," J. Appl. Phys. 122, 075302 (2017).
P. Uprety, K. Lambright, C. R. Grice, M. M. Junda, D. M. Giolando, and N. J. Podraza, "Morphological and optical properties of low temperature processed SnO2:F," Phys. Status Solidi B 254, 1700102 (2017).
P. Uprety, M. M. Junda, K. Ghimire, D. Adhikari, and N. J. Podraza, “Spectroscopic ellipsometry determination of optical and electrical properties of aluminum doped zinc oxide,” Appl. Surf. Sci. 421, 852-858 (2017).
D. Adhikari, M. M. Junda, P. Uprety, K. Ghimire, I. Subedi, and N. J. Podraza, “Near infrared to ultraviolet anisotropic optical properties of single crystal SrLaAlO4 from spectroscopic ellipsometry,” Phys. Stat. Sol. B 253, 2066 (2016).
C. Zhang, 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 Photon. Rev. 10, 791 (2016).
M. M. Junda, 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 studied by spectroscopic ellipsometry,” J. Appl. Phys. 120, 015306 (2016).
L. Karki Gautam, 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).
Z. Huang, 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,” IEEE J. Photovolt. 5, 1516 (2015).
M. M. Junda, A. Shan, 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,” IEEE J. Photovolt. 5, no. 1, 307-312 (2015).
L. Karki Gautam, H. Haneef, M. M. Junda, D. B. Saint John, N. J. Podraza, “Approach for extracting complex dielectric function spectra in weakly-absorbing regions,” Thin Solid Films 571, no. 1, 548-553 (2014).
S. Sallis, K. T. Butler, N. F. Quackenbush, D. S. Williams, 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,” Appl. Phys. Lett. 104, 232108, (2014).
Conference Activity
Talks
M. M. Junda, A. B. Phillips, R. R. Khanal, M. J. Heben, and N. J. Podraza, "Measurement of Conductivity Anisotropy and Real-Time Doping in Carbon Nanotube Films by THz Spectroscopic Ellipsometry," oral presentation by M. M. Junda, 8th International Conference on Spectroscopic Ellipsometry, Barcelona, Spain (May 2019).
D. Adhikari, M. M. Junda, E. Bastola, P. Koirala, R. J. Ellingson, R. W. Collins, and N. J. Podraza, "Nanostructured CdTe Films by Glancing Angle Deposition," oral presentation by D. Adhikari at 2019 SVC Tech Con, Long Beach, CA (April 2019).
M. M. Junda, A. B. Phillips, R. R. Khanal, M. J. Heben, and N. J. Podraza, "Contactless Detection of Opto-Electronic Anisotropy and Real-Time Atmospheric Doping in Single Walled Carbon Nanotube Films," oral presentation by M. M. Junda, 2018 MRS Fall Meeting & Exhibit, Boston, MA (November 2018).
B. Subedi, C. Li, M. M. Junda, D. Zhao, C. Wang, C. Chen, Y. Yan, and N. J. Podraza, "Impact of Thin Film Perovskite Composition on Sub-Band Gap Absorption Due to Defect States," oral presentation by B. Subedi, 2018 MRS Fall Meeting & Exhibit, Boston, MA (November 2018).
M. M. Junda, P. B. Ribbon, and N. J. Podraza, "Lost in Transition: VO2s Wild Ride," oral presentation by M. M. Junda at the 2018 Annual Fall Meeting of the APS Ohio-Region Section, Toledo, OH (September 2018)
M. M. Junda, 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,” oral presentation by M. M. Junda at the 44th IEEE Photovoltaics Specialists Conference, Washington, D.C. (June 2017).
P. Uprety, I. Subedi, M. M. Junda, D. Adhikari, and N. J. Podraza, “Electrical Transport Properties from Long Wavelength Ellipsometry,” oral presentation by P. Uprety at the 44th IEEE Photovoltaics Specialists Conference, Washington, D.C. (June 2017).
M. M. Junda, C. R. Grice, Y. Yan, N. J. Podraza, “Spectroscopic Ellipsometry Studies of CdS-CdSe-CdTe Alloys: Applications in Thin Film Solar Cells,” oral presentation by M. M. Junda at American Vacuum Society 63rd International Symposium and Exhibition, Nashville, TN (November 2016).
D. Adhikari, M. M. Junda, N. J. Podraza, “Development of Growth Evolution Diagrams for RF Sputtered Nanocrystalline Hydrogenated Silicon Thin Films via Real Time Spectroscopic Ellipsometry,” oral presentation by D. Adhikari at the American Vacuum Society 63rd International Symposium and Exhibition, Nashville, TN (November 2016).
P. Uprety, M. Junda, K. Lambright, R. Khanal, A. Phillips, M. Heben, D. Giolando, and N. Podraza, “Optical Determination of Electrical Response for Thin Film Transparent Conductors: Spectral Range Dependence,” oral presentation by P. Uprety at the American Vacuum Society 63rd International Symposium and Exhibition, Nashville, TN (November 2016).
Invited Talk: M. M. Junda, C. R. Grice, I. Subedi, X. Tan, R. W. Collins, Y. Yan, and N. J. Podraza, “Effects of Oxygen Partial Pressure, Deposition Temperature, and Annealing on the Optical Response of CdS:O Thin Films,” invited oral presentation by M. M. Junda at the 7th International Conference on Spectroscopic Ellipsometry, Berlin, Germany (June 2016).
M. Losurdo, M. M. Junda, M. M. Giangregorio, N. J. Podraza, R. W. Collins, and A. S. Brown, “THz to IR and UV Ellipsometry: Revealing Behavior of Si-Supported Gallium Plasmonic Nanoparticles,” oral presentation by M. Losurdo at the 7th International Conference on Spectroscopic Ellipsometry, Berlin, Germany (June 2016).
Z. Huang, 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,” oral presentation by N. J. Podraza at the 42nd IEEE Photovoltaics Specialists Conference, New Orleans, LA (June 2015).
L. Karki Gautam, 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,” oral presentation by L. Karki Gautam at the 42nd International Conference on Metallurgical Coatings and Thin Films, San Diego, CA (April 2015).
M. M. Junda, K. Ghimire, A. Barnes, L. Karki Gautam, and N. J. Podraza, “Combined Optical Emission Spectroscopy and Spectroscopic Ellipsometry Collected During Thin Film Deposition,” oral presentation by M. M. Junda at the American Vacuum Society 61st International Symposium and Exhibition, Baltimore, MD (November 2014).
M. M. Junda, L. R. Dahal, P. Koirala, D. Attygalle, P. Aryal, P. Pradhan, C. Salupo, D. Saint John, R. W. Collins, and N. J. Podraza, “Spectroscopic Characterization in the Photovoltaic Device Configuration,” invited oral presentation by N. J. Podraza at the American Vacuum Society 61st International Symposium and Exhibition, Baltimore, MD (November 2014).
M. M. Junda, A. Shan, 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,” oral presentation by M. M. Junda at 40th IEEE Photovoltaics Specialists Conference, Denver, CO (June 2014).
Posters
M. M. Junda and N. J. Podraza, "Spectroscopic Ellipsometry Guidance for Fabrication and Operation of Thermochromic Polycrystalline Vanadium Dioxide Films," poster presentation by M. M. Junda at the 8th International Conference on Spectroscopic Ellipsometry, Barcelona, Spain (May 2019).
M. M. Junda, D. Adhikari, B. Subedi, Y. Yan, R. W. Collins, and N. J. Podraza, "Parametric Models for Polycrystalline Semiconductors," poster presentation by N. J. Podraza at the 8th International Conference on Spectroscopic Ellipsometry, Barcelona, Spain (May 2019).
B. Subedi, C. Li, M. M. Junda, K. Ghimire, Z. Song, D. Zhao, Y. Yan, and N. J. Podraza, "Optical Probing of Inorganic-Organic Lead Halide Perovskite Thin Films and Solar Cells," poster presentation by B. Subedi at the 8th International Conference on Spectroscopic Ellipsometry, Barcelona, Spain (May 2019).
M. M. Junda, C. R. Grice, P. Uprety, P. Koirala, R. W. Collins, Y. Yan, and N. J. Podraza, "A Versatile Optical Model Applied to CdTe and CdSe(1-y)Te(y) Alloys: Sensitivity to Film Composition and Relative Defect Density," poster presentation by M. M. Junda at the 7th World Conference on Photovoltaic Energy Conversion, Waikoloa, HI (June 2018).
D. Adhikari, P. Koirala, M. M. Junda, R. W. Collins, and N. J. Podraza, "Glancing Angle Deposited CdTe: Optical Properties and Structure," poster presentation by M. M. Junda at the 7th World Conference on Photovoltaic Energy Conversion, Waikoloa, HI (June 2018).
B. Subedi, L. Guan, Y. Yu, K. Ghimire, P. Uprety, Y. Yan, and N. Podraza, "Formamidinium + Cesium Lead Triiodide Perovskite Thin Films: Optical Properties and Devices," poster presentation by M. M. Junda at the 7th World Conference on Photovoltaic Energy Conversion, Waikoloa, HI (June 2018).
M. M. Junda, L. Karki Gautam, R. W. Collins, and N. J. Podraza, “Optical Property Gradients in a-Si:H Thin Films Studied by Virtual Interface Analysis of Real Time Spectroscopic Ellipsometry,” poster presentation by M. M. Junda at the 7th International Conference on Spectroscopic Ellipsometry, Berlin, Germany (June 2016).
P. Uprety, M. M. Junda, K. Ghimire, and N. J. Podraza, “Spectroscopic Ellipsometry Determination of Optical and Electrical Properties of Aluminum Doped Zinc Oxide,” poster presentation by M. M. Junda at the 7th International Conference on Spectroscopic Ellipsometry, Berlin, Germany (June 2016).
M. M. Junda, L. Karki Gautam, R. W. Collins, and N. J. Podraza, “Spectroscopic Ellipsometry Studies of Amorphous Silicon Based Photovoltaic Devices,” poster presentation by M. M. Junda at the American Vacuum Society 61st International Symposium and Exhibition, Baltimore, MD (November 2014).
P. Koirala, 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,” poster presentation by P. Koirala at the IEEE Photovoltaics Specialists Conference, Denver, CO (June 2014).
N. J. Podraza, L. Karki Gautam, M. Junda, H. Haneef, L. Ye, and D. B. Saint John, “Approach for Extracting the Complex Dielectric Function Spectra in Weakly-Absorbing Regions,” poster presentation by N. J. Podraza at the 6th International Conference on Spectroscopic Ellipsometry, Kyoto, Japan (May 2013).