960mV open circuit voltage chalcopyrite solar cell

Abstract

Open circuit voltage of 960mV on chalcopyrite solar cell was achieved by pure-sulfide CuInGaS2 solar cell. Generally, high performance CuInGaS2 needs KCN-etching treatment to remove CuS layer, however, we could fabricate it without KCN-etching treatment. Additionally, Cd-free buffer layer was applied for current density improvement and the champion cell demonstrated over 14% efficiency. In this paper, the latest results for high performance pure-sulfide CuInGaS2 cells will be presented.