气候变化领域集成服务门户(CCPortal): Organic molecule assisted growth of perovskite films consisting of square grains by surface‐confined process

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DOI	10.3390/nano11020473
	Organic molecule assisted growth of perovskite films consisting of square grains by surface‐confined process
	Yan S.X.; Han C.B.; Huang J.; Chen Y.; Zhang X.; Chen X.; Zhang Y.; Yan H.
发表日期	2021
ISSN	20794991
起始页码	1
结束页码	12
卷号	11 期号:2
英文摘要	Organic–inorganic perovskite single crystals are promising in the field of optoelectronics due to their excellent optoelectronic properties. However, the ion transport of perovskite precursor is poor in confined spaces, which results in difficulty in the preparation of perovskite single‐crystal films. Herein, MAPbBr3 films consisting of square grains were fabricated by the surface‐confined process using the organic molecule PEAI (phenethylammonium iodide). Under the effect of over-saturation gradient, PEA+ is combined with the surface of perovskite grain from top to side, which constrains the lateral growth of grains and induces a downward growth of perovskite, leading to the formation of square grains. With the improvement of concentration PEAI, the perovskite film exhibits a decreased side length of grains (from 0.98 to 12.96 μm) and increased grain number and coverage, as well as crystallinity. The perovskite single crystalline grain films with PEAI showed double photoluminescence (PL) emission peaks due to the existence of iodine‐rich perovskite. This work may provide a practical way to fabricate high‐quality perovskite films for perovskite photoe-lectronic devices. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
英文关键词	MAPbBr3; Perovskite; Phenethylammonium iodide (PEAI); Single crystal; Surface‐con-fined process
来源期刊	Nanomaterials
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177261
作者单位	Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China; College of Petrochemical Engineering, Hunan Petrochemical Vocational Technology College, Hunan, 414012, China
推荐引用方式 GB/T 7714	Yan S.X.,Han C.B.,Huang J.,等. Organic molecule assisted growth of perovskite films consisting of square grains by surface‐confined process[J],2021,11(2).
APA	Yan S.X..,Han C.B..,Huang J..,Chen Y..,Zhang X..,...&Yan H..(2021).Organic molecule assisted growth of perovskite films consisting of square grains by surface‐confined process.Nanomaterials,11(2).
MLA	Yan S.X.,et al."Organic molecule assisted growth of perovskite films consisting of square grains by surface‐confined process".Nanomaterials 11.2(2021).