@inproceedings{91fe6630e46645479faed58ee909890b,
title = "Nonlinear effects in modeling thin-film graded-bandgap solar cells",
abstract = "We model the effect of concentrated sunlight on CIGS thin-film graded-bandgap solar cells using an optoelectronic numerical model. For this purpose it is necessary first to solve the time-harmonic Maxwell equations to compute the electric field in the device due to sunlight and so obtain the electron-hole-pair generation rate. The generation rate is then used as input to a drift-diffusion model governing the flow of electrons and holes in the semiconductor components that predicts the current generated. The optical submodel is linear; however, the electrical submodel is nonlinear. Because the Shockley-Read-Hall contribution to the electron-hole recombination rate increases almost linearly at high electron/hole densities, the efficiency of the solar cell can improve with sunlight concentration. This is illustrated via a numerical study.",
author = "Faiz Ahmad and Civiletti, {Benjamin J.} and Akhlesh Lakhtakia and Monk, {Peter B.}",
note = "Funding Information: This research was supported by the US National Science Foundation under grants numbered DMS-1619901 and DMS-1619904 as well as by the Charles Godfrey Binder Endowment at Penn State. Publisher Copyright: Copyright {\textcopyright} 2022 SPIE.; Active Photonic Platforms 2022 ; Conference date: 21-08-2022 Through 25-08-2022",
year = "2022",
doi = "10.1117/12.2632264",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Subramania, {Ganapathi S.} and Stavroula Foteinopoulou",
booktitle = "Active Photonic Platforms 2022",
address = "United States",
}