Dataset of "How the absorber thickness affects the electrical and structural properties of Sb2Se3 solar cells"

In this study, we analyze the impact of different thickness of antimony selenide (Sb2Se3) thin films and post annealing treatment on the electrical properties of the absorber and on the efficiency of the finished solar cells. Sb2Se3 absorbers have been deposited with thickness from 400 nm up to 1200 nm, grown by thermal evaporation on CdSe buffer layer in superstrate configuration. Surprisingly, the highest efficiency has been delivered by the Sb2Se3 with the lowest thickness, analysis shows a large absorption spectra and higher quantum efficiency response as well as a higher carrier concentration. On the contrary, no difference in crystal orientation between different thicknesses with orientation that results not particular favorable.The post-annealing treatment in air ambient at 150°C, improves the final efficiency of the cells with a major impact on the thinnest absorber. It increases the Voc and it corrects the rollover effect observed in the JV of the thicker absorber layers. There are no effects on the crystal structure (size and orientation of the grains) but mostly on the passivation of the defects