We show that bi-exciton formation can be highly efficient in a solar cell with the semiconductor absorber filled with an array of metallic nanoparticles having plasmonic resonance tuned to the semiconductor gap energy. This process can be viewed as plasmon-enhanced multiple exciton generation (PMEG), with the resulting cell efficiency exceeding the Shockley-Queisser limit. We demonstrate, that efficiency of the PMEG process, increases with decreasing of the semiconductor gap size, and illustrate that by considering in detail three systems with gradually decreasing gap size: GaAs, Si and Ge.
@article{arxiv.1806.10259,
title = {Plasmonic multiple exciton generation},
author = {Jiantao Kong and Xueyuan Wu and Xin Wang and Michael J Naughton and Krzysztof Kempa},
journal= {arXiv preprint arXiv:1806.10259},
year = {2019}
}