Improvement of perovskite solar cell performance by oleylamine treatment of CuSCN hole-transport layer

Abstract Post-treatment of perovskite solar cells with CuSCN hole-transport layers to enhance their photovoltaic performance was investigated. Crystallinity and uniformity of CuSCN layers were improved by recrystallisation caused by oleylamine (OA) treatment. Further, the OA adsorbed on CuSCN tuned the VB edge potential and improved the hole extraction from perovskite materials. Power conversion efficiency of the CuSCN-based perovskite solar cells improved from 8.58% to 11.4%.