An Interlayer with Strong Pb-Cl Bond Delivers Ultraviolet-Filter-Free, Efficient, and Photostable Perovskite Solar Cells
Pengjie Hang,
Jiangsheng Xie,
Ge Li,
Ying Wang,
Desheng Fang,
Yuxin Yao,
Danyan Xie,
Can Cui,
Keyou Yan,
Jianbin Xu,
Deren Yang,
Xuegong Yu
Affiliations
Pengjie Hang
State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
Jiangsheng Xie
State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China; Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong 999077, China; Corresponding author
Ge Li
State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
Ying Wang
State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
Desheng Fang
Center for Optoelectronics Materials and Devices, Department of Physics, Zhejiang Sci-Tech University, Hangzhou 310018, China
Yuxin Yao
Center for Optoelectronics Materials and Devices, Department of Physics, Zhejiang Sci-Tech University, Hangzhou 310018, China
Danyan Xie
Center for Optoelectronics Materials and Devices, Department of Physics, Zhejiang Sci-Tech University, Hangzhou 310018, China
Can Cui
Center for Optoelectronics Materials and Devices, Department of Physics, Zhejiang Sci-Tech University, Hangzhou 310018, China
Keyou Yan
Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong 999077, China
Jianbin Xu
Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong 999077, China
Deren Yang
State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
Xuegong Yu
State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China; Corresponding author
Summary: The inorganic metal oxides (IMOs), including titanium dioxide (TiO2) and tin dioxide (SnO2), inevitably induce decomposition of perovskite under UV illumination owing to their photocatalytic activity, and the use of a UV filter will add extra cost and reduce the effective power output. Here, we first reveal that the weak Pb-I bond in I-based perovskite is prone to breakage under UV photocatalysis, leading to serious degradation of the SnO2/perovskite interface. We introduced a chlorine-rich mixed-halide perovskite interlayer (ClMPI), which possesses an excellent tolerance to photocatalysis owing to the strong Pb-Cl bond, between the SnO2 and I-based perovskite. The ClMPI-based device achieves an enhanced efficiency of up to 21.01% (certified 20.17%). Most importantly, the resultant devices can maintain >94% of their initial performance after 180 h under outdoor solar irradiation, >80% after 500 h under UV irradiation, and 500 h under continuous full spectrum illumination at their maximum power points. : Catalysis; Energy Storage; Energy Materials Subject Areas: Catalysis, Energy Storage, Energy Materials
