Two-dimensional Ruddlesden–Popper layered perovskite solar cells based on phase-pure thin films

Chao Liang, Hao Gu, Yingdong Xia, Zhuo Wang, Xiaotao Liu, Junmin Xia, Shouwei Zuo, Yue Hu, Xingyu Gao, Wei Hui, Lingfeng Chao, Tingting Niu, Min Fang, Hui Lu, Han Dong, Hui Yu, Shi Chen, Xueqin Ran, Lin Song, Bixin Li, Jing Zhang, Yong Peng, Guosheng Shao, Jianpu Wang, Yonghua Chen (), Guichuan Xing () and Wei Huang ()
Additional contact information
Chao Liang: Nanjing Tech University
Hao Gu: Nanjing Tech University
Yingdong Xia: Nanjing Tech University
Zhuo Wang: Zhengzhou University
Xiaotao Liu: Nanjing Tech University
Junmin Xia: University of Macau
Shouwei Zuo: Chinese Academy of Sciences
Yue Hu: Lanzhou University
Xingyu Gao: Chinese Academy of Sciences
Wei Hui: Nanjing Tech University
Lingfeng Chao: Northwestern Polytechnical University
Tingting Niu: Northwestern Polytechnical University
Min Fang: Nanjing Tech University
Hui Lu: Nanjing Tech University
Han Dong: Nanjing Tech University
Hui Yu: Nanjing Tech University
Shi Chen: University of Macau
Xueqin Ran: Nanjing Tech University
Lin Song: Northwestern Polytechnical University
Bixin Li: Hunan First Normal University
Jing Zhang: Chinese Academy of Sciences
Yong Peng: Lanzhou University
Guosheng Shao: Zhengzhou University
Jianpu Wang: Nanjing Tech University
Yonghua Chen: Nanjing Tech University
Guichuan Xing: University of Macau
Wei Huang: Nanjing Tech University

Nature Energy, 2021, vol. 6, issue 1, 38-45

Abstract: Abstract Two-dimensional Ruddlesden–Popper layered metal-halide perovskites have attracted increasing attention for their desirable optoelectronic properties and improved stability compared to their three-dimensional counterparts. However, such perovskites typically consist of multiple quantum wells with a random well width distribution. Here, we report phase-pure quantum wells with a single well width by introducing molten salt spacer n-butylamine acetate, instead of the traditional halide spacer n-butylamine iodide. Due to the strong ionic coordination between n-butylamine acetate and the perovskite framework, a gel of a uniformly distributed intermediate phase can be formed. This allows phase-pure quantum well films with microscale vertically aligned grains to crystallize from their respective intermediate phases. The resultant solar cells achieve a power conversion efficiency of 16.25% and a high open voltage of 1.31 V. After keeping them in 65 ± 10% humidity for 4,680 h, under operation at 85 °C for 558 h, or continuous light illumination for 1,100 h, the cells show

Date: 2021
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DOI: 10.1038/s41560-020-00721-5

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