Why Do Perovskite Nanocrystals Form Nanocubes and How Can Their Facets Be Tuned? A Perspective from Synthetic Prospects,ACS Energy Letters

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Why Do Perovskite Nanocrystals Form Nanocubes and How Can Their Facets Be Tuned? A Perspective from Synthetic Prospects
ACS Energy Letters ( IF 19.3 ) Pub Date : 2020-12-08 , DOI: 10.1021/acsenergylett.0c02099
Narayan Pradhan ₁

Affiliation

Lead halide perovskite nanocrystals have recently emerged as the workhorse in quantum dot research for their unprecedented high brightness and tunable colors in the most in-demand red–green–blue windows. In most cases, it was revealed that these nanocrystals typically retain the hexahedron cubic or platelet shape. This has been observed for all lead halide perovskites, including mixed halides and hybrid perovskites. Hence, the big question remains whether multifaceted nanocrystals other than nanocubes remained synthetically challenging or the material preferred to retain the stable cube structure with particular lead halide octahedra arrangements. Multifaceted nanocrystals have several advantages because these might trigger anisotropic growth, self-assembly, and oriented attachment and also generate more efficient adsorption sites for catalysis. Keeping all these issues in mind, this Perspective discusses several successes and challenges in facet tuning of these nanocrystals and provides several concepts in generating new facets during their synthesis.

中文翻译：

钙钛矿纳米晶体为何形成纳米立方体，其晶面如何调整？综合前景的视角

卤化钙钛矿型纳米晶体最近因其在需求最大的红绿蓝窗口中空前的高亮度和可调节的颜色而成为量子点研究的主力军。在大多数情况下，揭示出这些纳米晶体通常保持六面体立方或血小板形状。对于所有卤化铅钙钛矿，包括混合卤化物和杂化钙钛矿，均已观察到这一点。因此，仍然存在一个大问题，即纳米立方体以外的多面纳米晶体是否仍然在合成方面具有挑战性，还是采用特定的卤化铅八面体排列来保持稳定的立方体结构的材料。多面纳米晶体具有几个优点，因为它们可能会引发各向异性的生长，自组装和定向附着，并且还会产生更有效的催化吸附位。

更新日期：2021-01-08

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