The unique crystal structure and optoelectronic properties of zero-dimensional perovskite-analogues have attracted a great amount of research interest in recent years. However, much of the 0D perovskite-anaogues contain lead, making them hazardous for the environment. Herein, we report a facile synthesis towards a lead-free perovskite-analogue, Cs3BiX6 NC (X=Cl, Br). We observe a broad photoluminescence peak centered at 390 nm, which we tentatively assign to the photoluminescence of self-trapped exciton. Furthermore, we demonstrate that the Cs3BiX6 NCs can transform into other bismuth-based perovskite-analogues nanocrystals via facile anion exchange or metal ion insertion reactions. The high activity and the preservation of nanoscale structure made Cs3BiX6 NCs potential reaction precursors towards other bismuth-based perovskite-analogue nanocrystals that are hard to obtain otherwise. This work presented here can inspire insight into the structure-property relationship for 0D perovskite-analogue nanomaterials and promote the fabrication of perovskite optoelectronic devices.

Lead-free, zero-dimensional perovskite-analogue nanocrystals with rich post-synthetic transformation reactions

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.