Low‐dimensional single‐cation formamidinium lead halide perovskites (FAm+2PbmBr3m+2): from synthesis to rewritable phase‐change memory film

0542144 - ÚMCH 2022 RIV DE eng J - Journal Article
Minh, D. N. - Nguyen, L. A. T. - Trinh, C. T. - Oh, C. - Eom, S. - Vu, T. V. - Choi, J. - Sim, J. H. - Lee, K.-G. - Kim, J. - Cho, S. C. - Lee, S. U. - Cimrová, Věra - Kang, Y.
Low‐dimensional single‐cation formamidinium lead halide perovskites (FAm+2PbmBr3m+2): from synthesis to rewritable phase‐change memory film.
Advanced Functional Materials. Roč. 31, č. 17 (2021), č. článku 2011093. ISSN 1616-301X. E-ISSN 1616-3028
R&D Projects: GA ČR(CZ) GC20-15498J
Institutional support: RVO:61389013
Keywords : single-cation * formamidinium * perovskite
OECD category: Polymer science
Impact factor: 19.924, year: 2021
Method of publishing: Limited access
https://onlinelibrary.wiley.com/doi/10.1002/adfm.202011093

Synthesis of 2D perovskites often demands long and bulky organic spacer cations, but they hamper optoelectronic properties of the resulting 2D perovskites. Novel low‐dimensional single‐cation perovskites with a general formula of FAm+2PbmBr3m+2 are prepared by using a quenching‐assisted solution process, which leads to the wide dimensional control over 1D FA3PbBr5 (m = 1), 2D FAm+2PbmBr3m+2 (m ≥ 2), and 3D FAPbX3 (m = ∞) perovskites simply by changing the composition of precursors. In this case, formamidinium (FA) acts as both an A‐site cation and spacer cation in FAm+2PbmBr3m+2. Unlike conventional 2D perovskites, FAm+2PbmBr3m+2 perovskites have (110) orientation. PVDF (poly(vinylidene fluoride)) preferentially stabilizes the low‐dimensional FAm+2PbmBr3m+2 phases, which is utilized to fabricate the stable FAm+2PbmBr3m+2‐PVDF composite films. The phase transitions from 1D and 2D to 3D are investigated in response to various stimuli, including humidity, ultraviolet, oxygen, and solvents, are exploited for rewritable phase‐change memory films.
Permanent Link: http://hdl.handle.net/11104/0319788