摘要
Developing efficient electron transport layers(ETLs)along with proper interface engineering is crucial to achieve high-performance perovskite solar cells(PSCs).Herein,a photo-assisted doping strategy was developed to modify SnO_(2)ETLs with Cl^(-)for efficient PSCs.The Cl^(-)modified SnO2(Cl^(-)SnO_(2))with passivated surface defects as ETL material favors the formation of high phase-purity perovskite films and promotes the electron collection across the SnO_(2)/perovskite interface.Consequently,the efficiency of PSC is improved from 16.35%without Cl modification to 18.94%with the Cl modification,with little hysteresis and high stability.
基金
This work was financially supported by the National Natural Science Foundation of China(Nos.51825204 and 52072377)
the Key Research Program of Frontier Sciences CAS(No.QYZDB-SSW-JSC039)
the Youth Innovation Promotion Association of the Chinese Academy of Sciences(No.2020192).
