Pulsed laser deposition of antimony selenosulfide thin film for efficient solar cells
Chao Chen, Yiwei Yin, Weitao Lian, Lifeng Jiang, Rongfeng Tang, Chenhui Jiang, Chunyan Wu, Di Gao, Xiaomin Wang, Fang Fang, Changfei Zhu, Tao Chen
Abstract
Antimony selenosulfide, Sb2(SxSe1−x)3, has been considered as a promising light harvesting material for low-cost, non-toxic, and stable solar cell applications. However, current preparation methods of Sb2(SxSe1−x)3 suffer from low-quality films, which hampers the performance improvement in Sb2(SxSe1−x)3-based solar cells. Herein, we develop a pulsed laser deposition technique to fabricate antimony selenosulfide films with flat and compact surface morphology and high crystallinity. The composition of the as-obtained films can be conveniently tuned via varying molar ratios of Sb2S3 and Se in targets. At optimized conditions, we fabricate planar heterojunction solar cells and then obtain a significantly improved power conversion efficiency of 7.05%. Our research offers a facile and robust preparation method for Sb2(SxSe1−x)3 films with enhanced photovoltaic properties.