Fabrication and characterization of air-stable, highly efficient all-inorganic CsPbBr3 perovskite solar cell

Cesium lead bromide (CsPbBr3) Perovskite solar cell (PvSCs) is very popular and a most promising photovoltaic devices with outstanding environmental stability and low-cost fabrication method for commercial application. We have fabricated SnO2 and AZO-based n-i-p PvSCs and compared the power conversion efficiency (PCE) of both the devices. The AZO-based PvSCs exhibits higher value of PCE of 7.30%, with a fill factor (FF) of 63.13%, whereas SnO2-based PvSCs shows 6.17% efficiency with a low FF of 61.55%. Moreover, the unencapsulated device with AZO electron transporting layer (ETL) exhibited remarkable stability in ambient air and retained its 85% of efficiency after 2000 h.