Proceedings of nanoGe Spring Meeting 2022 (NSM22)
DOI: https://doi.org/10.29363/nanoge.nsm.2022.136
Publication date: 7th February 2022
The anion and cation exchanges in nanocrystals are common synthetic strategies to tune their optoelectronic properties. The process of ion exchanges often leads to the formation of heterostructures inside the nanocrystals - that may control their stability and other properties. A fundamental understanding of ion exchange processes and ion exchange induced heterostructures is necessary.
In this talk, we will be discussing the anion exchange in CsPbX3 nanocrystals and how it can lead to the formation of internal heterostructures. It is generally believed that the anion-exchanged nanocrystals possess a homogeneously alloyed composition. We have employed variable energy hard X-ray photoelectron spectroscopy to determine the internal heterostructure of anion-exchanged nanocrystals - which has a gradient-alloyed heterostructure. We will also discuss the mechanism of the anion exchange in pre-synthesized CsPbX3 nanocrystals.
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