biostudies-literatureSygletou MState Scholarships FoundationEuropean CommissionH2020 Excellent Science8121-8126https://www.ebi.ac.uk/biostudies/studies/S-EPMC6238712biostudies-literatureUnknown9(42)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 <i>via</i> 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 optoeChemical scienceAnion exchange in inorganic perovskite nanocrystal polymer composites.PMC6238712654360MIS: 5001552Kyriazi MEStratakis ESygletou MKanaras AGfalseAnion exchange in inorganic perovskite nanocrystal polymer composites.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 <i>via</i> 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 optoe2018-01-01T00:00:00Z2018 Nov2025-04-05T12:27:16.561Z2019-10-30T08:14:14ZS-EPMC62387123054256210.1039/c8sc02830c