Analysis of Selenization Processes for Antimony Selenide Solar Cells by Vacuum Evaporation

In the presented work, Antimony selenide (Sb2Se3) based thin films have been grown in superstrate configuration by low temperature thermal evaporation process. For re-incorporation of Se to adjust the stoichiometry and increase crystallization of the absorber has been done in this paper. Solar cells were fabricated in the superstrate configuration of Glass/ITO/ZnO/CdS/Sb2Se3/Cu/Au. Post deposition selenization of the as deposited samples at 300 and 400 °C in argon environment were carried out. Material characterization and the electrical characterization reveal the preferred orientation [hk1] of the Sb2Se3 when deposited via thermal evaporation ,a better device performance is observed with Bromine ethanol etching. Post deposition Selenization of the deposited sample under Argon environment shows that the champion solar cell showed a conversion efficiency of 1.2 % with a Voc of 402 mV and FF of 24.3% which is less than the as deposited sample.