Investigation of Cation Exchange Behaviors of FA(x)MA(1-x)PbI(3) Films Using Dynamic Spin-Coatingopen access
- Authors
- Yu, Hyang Mi; Jeong, Byeong Geun; Park, Dae Young; Lim, Seong Chu; Namkoong, Gon; Jeong, Mun Seok
- Issue Date
- Nov-2021
- Publisher
- MDPI
- Keywords
- cation exchange; dynamic spin-coating; FA(x)MA(1)(-)(x)PbI(3); delta-phase FAPbI(3); FA cations; MA cations
- Citation
- MATERIALS, v.14, no.21, pp.1 - 7
- Indexed
- SCIE
SCOPUS
- Journal Title
- MATERIALS
- Volume
- 14
- Number
- 21
- Start Page
- 1
- End Page
- 7
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/140506
- DOI
- 10.3390/ma14216422
- ISSN
- 1996-1944
- Abstract
- In this study, we fabricated and characterized uniform multi-cation perovskite FA(x)MA(1-x)PbI(3) 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 delta-phase FAPbI(3) in the FA(x)MA(1-x)PbI(3) films. The formation of delta-phase FAPbI(3) 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.
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