ANALYSIS OF SELENIZATION PROCESSES FOR ANTIMONY SELENIDE SOLAR CELLS BY VACUUM EVAPORATION.

摘要

In the presented work, Antimony selenide (Sb_2Se_3) 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/Sb_2Se_3/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 Sb_2Se_3 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 V_(oc) of 402 mV and FF of 24.3% which is less than the as deposited sample.