Investigation of Cation Exchange Behaviors of FA_xMA_1-xPBl₃ Films Using Dynamic Spin Coating

Authors

Hyang Mi Yu
Byeong Geun Jeong
Dae Young Park
Seong Chu Lim
Gon Namkoong, Old Dominion UniversityFollow
Mun Seok Jeong

Document Type

Article

Publication Date

2021

DOI

10.3390/ma14216422

Publication Title

Materials

Volume

14

Issue

21

Pages

6422 (1-7)

Abstract

In this study, we fabricated and characterized uniform multi-cation perovskite FA_xMA_1−xPbI₃ films. We used the dynamic spin-coating method to control the cation ratio of the film by gradually increasing the FA+, which replaced the MA+ in the films. When the FA+ concentration was lower than xFA ~0.415 in the films, the stability of the multi-cation perovskite improved. Above this concentration, the film exhibited δ-phase FAPbI₃ in the FA_xMA_1−xPbI₃ films. The formation of δ-phase FAPbI₃ disturbed the homogeneity of the photoluminescence spatial distribution and suppressed the absorption spectral bandwidth with the increasing bandgap. The precise control of the cation ratio of multi-cation perovskite films is necessary to optimize the energy-harvesting performance.

Comments

© 2021 by the authors.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) license.

Original Publication Citation

Yu, H.M., Jeon, B.G., Park, D.Y., Lim, S.C., Namkoong, G., & Jeong, M.S. (2021) Investigation of cation exchange behaviors of FA_xMA_1−xPbI₃ films using dynamic spin-coating. Materials, 14(21), 1-7, Article 6422. https://doi.org/10.3390/ma14216422

Repository Citation

Yu, H.M., Jeon, B.G., Park, D.Y., Lim, S.C., Namkoong, G., & Jeong, M.S. (2021) Investigation of cation exchange behaviors of FA_xMA_1−xPbI₃ films using dynamic spin-coating. Materials, 14(21), 1-7, Article 6422. https://doi.org/10.3390/ma14216422