Abstract

Understanding the function of moisture on perovskite is challenging since the random environmental moisture strongly disturbs the perovskite structure. Here, we develop various N2-protected characterization techniques to comprehensively study the effect of moisture on the efficient cesium, methylammonium, and formamidinium triple-cation perovskite (Cs0.05FA0.75MA0.20)Pb(I0.96Br0.04)3. In contrast to the secondary measurements, the established air-exposure-free techniques allow us directly monitor the influence of moisture during perovskite crystallization. We find a controllable moisture treatment for the intermediate perovskite can promote the mass transportation of organic salts, and help them enter the buried bottom of the films. This process accelerates the quasi-solid-solid reaction between organic salts and PbI2, enables a spatially homogeneous intermediate phase, and translates to high-quality perovskites with much-suppressed defects. Consequently, we obtain a champion device efficiency of approaching 24% with negligible hysteresis. The devices exhibit an average T80-lifetime of 852 h (maximum 1210 h) working at the maximum power point.

Perovskite structure is disturbed by environmental moisture, limiting the device performance. Here, Wei et al. monitor the effect of moisture during the growth by N2-protected characterization techniques, and obtain an operationally stable perovskite solar cell with efficiency approaching 24%.

Details

Title
Moisture-triggered fast crystallization enables efficient and stable perovskite solar cells
Author
Liu, Kaikai 1 ; Luo, Yujie 1 ; Jin, Yongbin 1 ; Liu, Tianxiao 2 ; Liang, Yuming 1 ; Yang, Liu 1 ; Song, Peiquan 1 ; Liu, Zhiyong 2 ; Tian, Chengbo 1 ; Xie, Liqiang 1   VIAFID ORCID Logo  ; Wei, Zhanhua 1   VIAFID ORCID Logo 

1  Huaqiao University, Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Institute of Luminescent Materials and Information Displays, College of Materials Science and Engineering, Xiamen, P.R. China (GRID:grid.411404.4) (ISNI:0000 0000 8895 903X) 
2  Henan Normal University, Henan Key Laboratory of Photovoltaic Materials, School of Physics, Xinxiang, P.R. China (GRID:grid.462338.8) (ISNI:0000 0004 0605 6769) 
Publication year
2022
Publication date
2022
Publisher
Nature Publishing Group
e-ISSN
20411723
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41467-022-32482-y
ProQuest document ID
2704121338
Copyright
© The Author(s) 2022. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.