Gen Zhou: Key Laboratory for Renewable Energy Chinese Academy of Sciences (CAS), Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics , CAS , Beijing 100190 , China.
Jionghua Wu: Key Laboratory for Renewable Energy Chinese Academy of Sciences (CAS), Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics , CAS , Beijing 100190 , China.
Yanhong Zhao: Key Laboratory for Renewable Energy Chinese Academy of Sciences (CAS), Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics , CAS , Beijing 100190 , China.
Yiming Li: Key Laboratory for Renewable Energy Chinese Academy of Sciences (CAS), Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics , CAS , Beijing 100190 , China.
Jiangjian Shi: Key Laboratory for Renewable Energy Chinese Academy of Sciences (CAS), Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics , CAS , Beijing 100190 , China.
Yusheng Li: Key Laboratory for Renewable Energy Chinese Academy of Sciences (CAS), Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics , CAS , Beijing 100190 , China.
Huijue Wu: Key Laboratory for Renewable Energy Chinese Academy of Sciences (CAS), Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics , CAS , Beijing 100190 , China.
Dongmei Li: Key Laboratory for Renewable Energy Chinese Academy of Sciences (CAS), Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics , CAS , Beijing 100190 , China.
Yanhong Luo: Key Laboratory for Renewable Energy Chinese Academy of Sciences (CAS), Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics , CAS , Beijing 100190 , China.
Qingbo Meng: Key Laboratory for Renewable Energy Chinese Academy of Sciences (CAS), Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics , CAS , Beijing 100190 , China. ORCID
In this study, we systematically explored the mixed-cation PerovskiteCs+ (MAFA)PbI fabricated via sequential introduction of cations. The details of the effects of Cs+ on the fabrication and performance of inorganic-organic mixed-cation Perovskite solar cells examined in detail in this study are beyond the normal understanding of the adjusting band gap. It is found that a combined intercalation of Cs+ and dimethyl sulfoxide (DMSO) in PbI-DMSO precursor film formed a strong and steady coordinated intermediate phase to retard PbI crystallization, suppress yellow nonperovskite δ-phase, and obtain a highly reproducible Perovskite film with less defects and larger grains. The Cs+-contained triple-cation-mixed PerovskiteCs+(MAFA)PbI devices yield over 20% reproducible efficiencies, superior stabilities, and fill factors of around 0.8 with a very narrow distribution.
