Investigating the Copper Doping Effects on the Performance of CoOx Based CH3NH3PbI3 Perovskite Solar Cells

Perovskite solar cells have garnered extensive focus in recent years owing to their unique characteristics and promising potential in photovoltaic applications. Hole transport layers (HTL) composed of metals are critical components for achieving stable performance in CH3NH3PbI3 perovskite solar cells. This study demonstrates the effect of metal doping in the CoOx HTL. A systematic investigation of photovoltaic performance was conducted using a fast and practical solution-based approach, incorporating Cu as a dopant. The structural and morphological properties were observed through surface roughness and electrical measurements. The Cu-doped CoOₓ film exhibited improved photovoltaic performance compared to its undoped counterpart, with efficiency reaching 9.02% from 6.17%.