Influence of Post-selenization Temperature on the Performance of Substrate-Type Sb2Se3 Solar Cells

Antimony selenide (Sb2Se3) solar cells are an environmentally friendly and cost-effective photovoltaic technology. In this work, we fabricate Sb2Se3 solar cells using closed-space sublimation followed by postdeposition selenization. We investigate the effects of the selenization temperature on the structural and morphological properties of Sb2Se3 films and photovoltaic performance of the corresponding devices. The results indicate that a proper selenization temperature is critical to achieving Sb2Se3 films with large grains, uniform morphology, high crystallinity, desired crystal orientations, and increased carrier density. By optimizing the selenization temperature, we obtained Sb2Se3 solar cells with a power-conversion efficiency of 6.43%.