Institute of Applied Physics

Boosting Open‐Circuit Voltage to a Record 0.692 V in Solution‐Processed CIGSSe Solar Cells Through Surface Ga‐Rich Engineering

ABSTRACT The open‐circuit voltage ( V OC ) deficit remains a primary bottleneck hindering the efficiency of solution‐processed Cu(In,Ga)(S,Se) 2 (CIGSSe) solar cells, largely due to the uncontrolled elemental diffusion during high‐temperature selenization that prevents the format...