A Review of Carrier Transport in High‐Efficiency Sb2(S,Se)3 Solar Cells

Abstract

As a kind new photovoltaic material, antimony sulfide–selenide (Sb2(S,Se)3) thin films have been considered a promising low‐cost solar cell absorption layer material due to their excellent photoelectric performance and stability. Continued research and development efforts have significantly increased the power conversion efficiency of Sb2(S,Se)3 solar cells over the past few years, which now exceeds 10%. High device performance requires efficient carrier collection and transport. A deeper understanding of the carrier‐transport process can guide the optimization of solar cell designs and materials. Herein, the factors affecting carrier transport combined with the crystal structure in Sb2(S,Se)3 solar cells are discussed. Recent advances in carrier management strategies to overcome the recombination losses are also discussed, broadly categorized into two main approaches: regulation of the absorption layer and optimization of the device interface contacts. Furthermore, the possible future research directions of Sb2(S,Se)3 solar cells are prospected.