棘轮
能量转换效率
太阳能电池效率
光伏系统
光子
限制
太阳能电池
光电子学
多激子产生
能量转换
载流子
太阳能电池理论
材料科学
物理
光学
电气工程
量子力学
工程类
机械工程
工作(物理)
作者
Megumi Yoshida,N. J. Ekins-Daukes,Daniel Farrell,Chris C. Phillips
摘要
In this paper, we propose an innovative concept for solar power conversion—the “photon ratchet” intermediate band solar cell (IBSC)—which may increase the photovoltaic energy conversion efficiency of IBSCs by increasing the lifetime of charge carriers in the intermediate state. The limiting efficiency calculation for this concept shows that the efficiency can be increased by introducing a fast thermal transition of carriers into a non-emissive state. At 1 sun, the introduction of a “ratchet band” results in an increase of efficiency from 46.8% to 48.5%, due to suppression of entropy generation.
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