Carbon-Based Sb2(S, Se)3 Solar Cells

Sb-2(S, Se)(3) solar cells have shown great promise due to the advantages of low cost, non-toxic and high stability. However, traditional devices commonly use noble metal as the back electrode, which not only increases device cost but also limits device stability. Herein, carbon materials are used to replace the noble metals in Sb-2(S, Se)(3) solar cells. In addition, to grow high-quality Sb-2(S, Se)(3) films, a two-step hydrothermal method was developed. The carbon-based Sb-2(S, Se)(3) solar cells based on the above film achieved a power conversion efficiency (PCE) of 2.76%. After inserting a stable P3HT layer at the Sb-2(S, Se)(3) film/carbon interface, hole extraction was enhanced and the PCE was promoted to 4.15%. This work brings out a promising route to produce emerging solar cells with cost-effective and stable materials.