Analysis of Optical Performance for Organic Solar Cell on Si Substrate

The effects of active layer thickness,capping layer thickness and transport layer thickness on the optical absorption of active layer have been investigated by employing MATLAB and an optical model based on the transfer matrix method.The results reveal that the absorption of active layer is mainly attributed to its thickness which could be optimized by the microcavity effect.Furthermore,it demonstrates that active layer optical absorption can be effectively improved by adjusting the thickness of capping layer and transport layer.At last,the results show that the solar cells with 10 nm thick transport layer have superior optical and electrical performance than those without transport layer;the optimized thickness of ZnS layer and the thickness of Alq3 layer are 30 nm and 60 nm,respectively.The research of optical properties of organic solar cell on Si substrate provides a theoretical basis to its future structural design and application.