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Issue 42, 2018
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Anion exchange in inorganic perovskite nanocrystal polymer composites

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Abstract

We demonstrate a facile, low-cost and room-temperature method of anion exchange in cesium lead bromide nanocrystals (CsPbBr3 NCs), embedded into a polymer matrix. The anion exchange occurs upon exposure of the solid CsPbBr3 NCs/PDMS nanocomposite to a controlled anion precursor gas atmosphere. The rate and extent of the anion exchange reaction can be controlled via the variation of either the exposure time or the relative concentration of the anion precursor gas. Post-synthesis chemical transformation of perovskite nanocrystal–polymer composites is not readily achievable using conventional methods of anion exchange, which renders the gas-assisted strategy extremely useful. We envisage that this work will enable the development of solid-state perovskite NC optoelectronic devices.

Graphical abstract: Anion exchange in inorganic perovskite nanocrystal polymer composites

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Supplementary files

Article information


Submitted
27 Jun 2018
Accepted
29 Aug 2018
First published
30 Aug 2018

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2018,9, 8121-8126
Article type
Edge Article

Anion exchange in inorganic perovskite nanocrystal polymer composites

M. Sygletou, M. Kyriazi, A. G. Kanaras and E. Stratakis, Chem. Sci., 2018, 9, 8121
DOI: 10.1039/C8SC02830C

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