Interdiffusion Stomatal Movement in Efficient Multiple-Cation-Based Perovskite Solar Cells

Cong Li; Zhinan Zhu; Bingqiang Niu; Fu Yang; Xinpeng Chen; Yingke Ren; Peng Zhong; Shuzi Hayase; Tianhong Cui; Rusen Yang

doi:10.1021/acsami.0c10873

Interdiffusion Stomatal Movement in Efficient Multiple-Cation-Based Perovskite Solar Cells

ACS Appl Mater Interfaces. 2020 Aug 5;12(31):35105-35112. doi: 10.1021/acsami.0c10873. Epub 2020 Jul 27.

Authors

Cong Li¹, Zhinan Zhu¹, Bingqiang Niu¹, Fu Yang², Xinpeng Chen¹, Yingke Ren³, Peng Zhong¹, Shuzi Hayase², Tianhong Cui⁴, Rusen Yang¹

Affiliations

¹ Academy of Advanced Interdisciplinary Research, School of Advanced Materials and Nanotechnology, Xidian University, Xi'an 710126, China.
² Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan.
³ College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China.
⁴ Department of Mechanical Engineering, University of Minnesota, Minneapolis, Minnesota 55445, United States.

PMID: 32662270
DOI: 10.1021/acsami.0c10873

Abstract

The composition and crystallization process are essential for high-quality perovskite films. Cesium (Cs) and methylammonium chlorine (MACl) were found to affect the crystallization kinetics of perovskite, and the performance and stability of corresponding devices were greatly improved. We adopted an ion exchange method to remove MACl vapor and add Cs to form a multiple-cation-based perovskite film. With the increase of annealing time, Cl^- from cesium chloride (CsCl) and MA from methylammonium bromide (MABr) formed gradually MACl vapor, and the porosity of surface morphology improved accordingly. The highly crystallized and compact Cs_yMA_{x - y}FA_{1 - x}PbI_{3 - x}Br_x perovskite film with different compositions was eventually obtained. The effects of the amount of MABr on the property of perovskite films and on the performance of the corresponding perovskite solar cells (PerSCs) were systematically studied. The PerSCs derived from 12 mg of MABr exhibit the best photovoltaic performance with a power conversion efficiency of 21.57% under 1 sun illumination.

Keywords: crystallinity; multiple-cation; perovskite solar cells; planar structure; stomatal movement.