Efficiency boosting in Sb₂(S,Se)₃ solar cells enabled by tailoring bandgap gradient <i>via</i> a hybrid growth method

Abstract

A novel hybrid growth method involving the first-stage hydrothermal deposition (HTD) process and the second-stage vapor transport deposition (VTD) enables an optimal bandgap gradient in Sb 2 (S,Se) 3 , ultimately leading to a remarkable efficiency improvement in Sb 2 (S,Se) 3 solar cells.