Dr. Randy J. Ellingson Profile

Dr. Randy J. Ellingson

Senior Scientist at National Renewable Energy Lab

SPIE Involvement:

Author

Publications (6)

Proceedings Article | 5 September 2015 Paper

Investigation of degradation mechanisms of perovskite-based photovoltaic devices using laser beam induced current mapping

Zhaoning Song, Suneth Watthage, Adam Phillips, Geethika Liyanage, Rajendra Khanal, Brandon Tompkins, Randy Ellingson, Michael Heben

Proceedings Volume 9561, 956107 (2015) https://doi.org/10.1117/12.2195789

KEYWORDS: Solar cells, Humidity, Photovoltaics, Resistance, Thin film devices, Thin films, Polymethylmethacrylate, Carbon nanotubes, Perovskite, Titanium dioxide

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Proceedings Article | 7 March 2014 Paper

Effects of electric field on thermal and tunneling carrier escape in InAs/GaAs quantum dot solar cells

Yushuai Dai, Stephen Polly, Staffan Hellström, Kristina Driscoll, David Forbes, Seth Hubbard, Paul Roland, Randy Ellingson

Proceedings Volume 8981, 898106 (2014) https://doi.org/10.1117/12.2040153

KEYWORDS: External quantum efficiency, Solar cells, Gallium arsenide, Quantum dots, Electrons, Doping, Band structure simulations, Temperature metrology, Absorption, Indium arsenide

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Proceedings Article | 25 September 2013 Paper

PbS quantum dot thin film solar cells using a CdS window layer

Khagendra Bhandari, Hasitha Mahabaduge, Jianbo Gao, Randy Ellingson

Proceedings Volume 8824, 88240I (2013) https://doi.org/10.1117/12.2025307

KEYWORDS: Cadmium sulfide, Solar cells, Lead, Thin film solar cells, Thin films, Excitons, Solar energy, Absorbance, Heterojunctions, Coating

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Proceedings Article | 16 May 1994 Paper

Ti:sapphire-pumped solid state source of high-repetition-rate femtosecond pulses tunable in the visible

Randy Ellingson, Chung Tang

Proceedings Volume 2116, (1994) https://doi.org/10.1117/12.175838

KEYWORDS: Optical parametric oscillators, Crystals, Ferroelectric materials, Femtosecond phenomena, Second-harmonic generation, Mirrors, Prisms, Laser crystals, Sapphire lasers, Phase matching

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Proceedings Article | 30 November 1992 Paper

Extending the frequency range of femtosecond lasers

Wayne Pelouch, Randy Ellingson, Peter Powers, Chung Tang

Proceedings Volume 1842, (1992) https://doi.org/10.1117/12.131870

KEYWORDS: Optical parametric oscillators, Crystals, Femtosecond phenomena, Mode locking, Output couplers, Second-harmonic generation, Ultrafast phenomena, Ferroelectric materials, Dispersion, Laser crystals

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Proceedings Article | 21 October 1992 Paper

Hot-carrier relaxation in quantum well and bulk GaAs at high carrier densities: femtoseconds to nanoseconds

Wayne Pelouch, Randy Ellingson, Peter Powers, Chung Tang, Dean Levi, Arthur Nozik

Proceedings Volume 1677, (1992) https://doi.org/10.1117/12.137691

KEYWORDS: Gallium arsenide, Picosecond phenomena, Quantum wells, Luminescence, Temporal resolution, Phonons, Femtosecond phenomena, Semiconductors, Absorption, Upconversion

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