Postsynthesis Transformation of Halide Perovskite Nanocrystals,ACS Energy Letters

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Postsynthesis Transformation of Halide Perovskite Nanocrystals
ACS Energy Letters ( IF 19.3 ) Pub Date : 2022-06-01 , DOI: 10.1021/acsenergylett.2c00888
Susmita Paul ₁ , Somobrata Acharya _{1,

2}

Affiliation

The high sensitivity of as-synthesized purified perovskite nanocrystals (NCs) to diverse conditions such as solvent polarity, aging, ligand treatment, heat, light, pressure, and humidity affects the surface chemistry. Ligand dynamics (adsorption and desorption) on the surfaces of the NCs plays a key role in the postsynthesis transformation of the morphology and crystallographic phase. Although the ligand destabilization mechanism changes the morphology and crystal structure of the pristine NCs, it also opens up opportunities to obtain interesting morphologies or different crystallographic phases with modified properties. There remain significant challenges in understanding the mechanism of postsynthesis transformation processes. This Focus Review aims to provide a survey of the current state of the postsynthesis transformation of perovskite NCs. The chemistry of controlling the resultant morphology and crystal structure of NCs in the postsynthesis conditions is examined. A more explorative direction for controlling the fundamental properties of the perovskite NCs through postsynthesis transformation is presented.

中文翻译：

卤化物钙钛矿纳米晶体的后合成转化

合成后的纯化钙钛矿纳米晶体 (NC) 对溶剂极性、老化、配体处理、热、光、压力和湿度等各种条件的高敏感性会影响表面化学。NCs表面上的配体动力学（吸附和解吸）在形态和结晶相的合成后转变中起关键作用。尽管配体失稳机制改变了原始 NCs 的形态和晶体结构，但它也为获得有趣的形态或具有改性性质的不同晶相提供了机会。在理解合成后转化过程的机制方面仍然存在重大挑战。本焦点回顾旨在提供对钙钛矿 NC 合成后转化现状的调查。研究了在合成后条件下控制 NC 的所得形态和晶体结构的化学性质。提出了通过合成后转换控制钙钛矿 NC 基本性质的更具探索性的方向。

更新日期：2022-06-01

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