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17 October 2014 Hot carrier solar cell absorbers: materials, mechanisms and nanostructures
Gavin Conibeer, Santosh Shrestha, Shujuan Huang, Robert Patterson, Hongze Xia, Yu Feng, Pengfei Zhang, Neeti Gupta, Murad Tayebjee, Suntrana Smyth, Yuanxun Liao, Zhilong Zhang, Simon Chung, Shu Lin, Pei Wang, Xi Dai
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Proceedings Volume 9178, Next Generation Technologies for Solar Energy Conversion V; 917802 (2014) https://doi.org/10.1117/12.2067926
Event: SPIE Solar Energy + Technology, 2014, San Diego, California, United States
Abstract
The hot carrier cell aims to extract the electrical energy from photo-generated carriers before they thermalize to the band edges. Hence it can potentially achieve a high current and a high voltage and hence very high efficiencies up to 65% under 1 sun and 86% under maximum concentration. To slow the rate of carrier thermalisation is very challenging, but modification of the phonon energies and the use of nanostructures are both promising ways to achieve some of the required slowing of carrier cooling. A number of materials and structures are being investigated with these properties and test structures are being fabricated. Initial measurements indicate slowed carrier cooling in III-Vs with large phonon band gaps and in multiple quantum wells. It is expected that soon proof of concept of hot carrier devices will pave the way for their development to fully functioning high efficiency solar cells.
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Gavin Conibeer, Santosh Shrestha, Shujuan Huang, Robert Patterson, Hongze Xia, Yu Feng, Pengfei Zhang, Neeti Gupta, Murad Tayebjee, Suntrana Smyth, Yuanxun Liao, Zhilong Zhang, Simon Chung, Shu Lin, Pei Wang, and Xi Dai "Hot carrier solar cell absorbers: materials, mechanisms and nanostructures", Proc. SPIE 9178, Next Generation Technologies for Solar Energy Conversion V, 917802 (17 October 2014); https://doi.org/10.1117/12.2067926
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KEYWORDS
Phonons
Indium nitride
Nanostructures
Acoustics
Gallium arsenide
Chemical elements
Solar energy
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