Methylammonium (MA)-free perovskite solar cells (PVSCs) have obtained great attention recently, owing to their superior stability. However, there are still gaps in efficiency between MA-free PVSCs and MA-containing counterparts. Their stability still needs to be further enhanced for meeting commercial standards, especially the illumination stability. Here, we incorporate Zn2+ into perovskite thin films to passivate defects, successfully achieving a champion efficiency of 20.7% and reinforcing the stability of MA-free FA0.9Cs0.1PbI3 PVSCs. This study reveals that Zn-doping can increase the grain size and contribute to modulate the crystallization process. Moreover, it is found that most of the Zn2+ aggregates at the grain boundaries passivating defects and, thus, effectively restrain the non-radiative recombination in the PVSCs. These findings provide a new way of realizing highly efficient and stable PVSCs.
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28 July 2020
Research Article|
July 23 2020
Effects of ZnI2 doping on the performance of methylammonium-free perovskite solar cells
Special Collection:
Hybrid Organic-Inorganic Halide Perovskites
Lei Yan;
Lei Yan
1
State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology
, 381 Wushan Road, Guangzhou 510640, People’s Republic of China
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Zhenchao Li;
Zhenchao Li
1
State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology
, 381 Wushan Road, Guangzhou 510640, People’s Republic of China
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Tianqi Niu;
Tianqi Niu
1
State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology
, 381 Wushan Road, Guangzhou 510640, People’s Republic of China
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Xiang Xu;
Xiang Xu
1
State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology
, 381 Wushan Road, Guangzhou 510640, People’s Republic of China
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Shenkun Xie;
Shenkun Xie
1
State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology
, 381 Wushan Road, Guangzhou 510640, People’s Republic of China
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Guanping Dong;
Guanping Dong
1
State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology
, 381 Wushan Road, Guangzhou 510640, People’s Republic of China
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Qifan Xue;
Qifan Xue
a)
1
State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology
, 381 Wushan Road, Guangzhou 510640, People’s Republic of China
2
Innovation Center for Printed Photovoltaics, South China Institute of Collaborative Innovation
, Dongguan 523808, People’s Republic of China
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Hin-Lap Yip
Hin-Lap Yip
a)
1
State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology
, 381 Wushan Road, Guangzhou 510640, People’s Republic of China
2
Innovation Center for Printed Photovoltaics, South China Institute of Collaborative Innovation
, Dongguan 523808, People’s Republic of China
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Note: This paper is part of the special collection on Hybrid Organic-Inorganic Halide Perovskites
J. Appl. Phys. 128, 043102 (2020)
Article history
Received:
April 30 2020
Accepted:
July 07 2020
Citation
Lei Yan, Zhenchao Li, Tianqi Niu, Xiang Xu, Shenkun Xie, Guanping Dong, Qifan Xue, Hin-Lap Yip; Effects of ZnI2 doping on the performance of methylammonium-free perovskite solar cells. J. Appl. Phys. 28 July 2020; 128 (4): 043102. https://doi.org/10.1063/5.0012370
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