Antimony Selenide Based Solar Cells by Vacuum Evaporation

In the presented work, Antimony selenide (Sb2Se3) thin films with varying thickness (1000, 700 and 500 nm) were prepared by low temperature thermal evaporation method. Solar cells were fabricated in the superstrate configuration of Glass/ITO/ZnO/CdS/Sb2Se3/Cu/Au. Cu addition after the deposition of Sb2Se3, was introduced to improve the back contact and the device performance. Material characterization and the electrical characterization reveal that the preferred orientation [hk1] of the Sb2Se3 is due to the vacuum annealing at 300 0C which leads to a better device performance; while Cu addition leads to a significant increase in the Voc and the fill factor (FF). The champion solar cell showed a conversion efficiency of 3.2 % with a Voc of 332 mV and FF of 43.3%