非对称微腔增强彩色半透明钙钛矿太阳能电池的光利用

Abstract Colorful semitransparent perovskite solar cells (PSCs) are emerging as attractive options for integrated photovoltaic applications, where efficient light management is crucial. In this work, an innovative approach using an asymmetric Fabry-Pérot (F-P) microcavity based on a Metal/Oxide/Metal (MOM) structure, comprising a bottom silver (b-Ag) layer, molybdenum oxide (MoO x ), and a top silver (t-Ag) layer, is proposed. Theoretical and experimental findings demonstrate that the asymmetric MOM structure, featuring a thicker b-Ag layer compared to the t-Ag layer, exhibits increased reflectance, reduced parasitic absorption, and maintained transmittance compared to the symmetric MOM structure. The mechanisms behind the optical characteristics of MOM microcavities are tentatively explored from the perspectives of loss index and effective impedance. Applying asymmetric MOM microcavity as top electrodes to green PSCs results in improvements in short circuit current density ( J sc ) and power conversion efficiency (PCE) by 6.2% and 5%, respectively, without compromising the intensity of the transmitted green light peak. As a result, the green PSCs using asymmetric MOM microcavities demonstrate enhanced the utilization of light, yielding an increase in the average quantum utilization efficiency from 76.0% to 81.9%. This study deepens the understanding of light management mechanisms in F-P microcavities and offers a novel strategy for designing high-performance colorful photovoltaics and other optoelectronic devices.