High performance of TiO2/CdS quantum dot sensitized solar cells with a Cu–ZnS passivation layer

Abstract

The Cu–ZnS passivation layer is considered to be far more efficient than the most widely used ZnS passivation layer in terms of enhancement of light harvesting and suppression of surface charge recombination. As a result, a TiO₂/CdS/Cu–ZnS quantum dot sensitized solar cell (QDSSC) exhibits a greatly improved efficiency of 3.35%, which is 30% and 82% higher than that of TiO₂/CdS/ZnS and TiO₂/CdS based QDSSCs, respectively.