Achieving 20％photovoltaic efficiency by manganese doped methylammonium lead halide perovskites

• 作者: Liangliang Deng Hanjun Yang Ruiheng Pan Haomiao Yu Jinpeng Li Ling Xu Kai Wang
• 来源期刊: 能源化学
• 年，卷（期）: 2021,（9）
• 页码范围: 376-383
• 页数: 8页
• 语种: 英文

摘要

We report a transition metal such as manganese doped methylammonium lead halide perovskite(MA(Pb∶Mn)I3)solar cell with an power conversion efficiency(PCE)over 20％.The rational design and fabri-cation of MA(Pb∶Mn)I3 lead to the enhancements of all the photovoltaic parameters.To incorporate Mn can effectively eliminate the trap-assist and bi-molecular recombination.The photo-absorption ability at shorter wavelengths(i.e.,less than 500 nm)and charge carrier lifetime can be elaborated.More impor-tantly,the existence of the Mn2+ -I--Mn3+ motif contributes for the double exchange effect,giving rise to the charge/spin transport.By a combination of linearly and circularly polarized photo-excitations,we have explicitly determined the role of intrinsic spin-orbit coupling(SOC)in MA(Pb∶Mn)I3.More dark states are expected to be available for the photocurrent generation.This study may pave the way for deep understandings of transition metals doped hybrid perovskites for highly efficient solar cell applications.