Synthesis and optical properties of ordered-vacancy perovskite cesium bismuth halide nanocrystals

Perovskite-phase cesium bismuth halide (Cs3Bi2X9; X = Cl, Br, I) nanocrystals were synthesized using a hot-injection approach. These nanocrystals adopted ordered-vacancy perovskite crystal structures and demonstrated composition-tunable optical properties. Growth occurred by initial formation of Bi0...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2018, Vol.54 (29), p.3640-3643
Main Authors: Nelson, R D, Santra, K, Wang, Y, Hadi, A, Petrich, J W, Panthani, M G
Format: Article
Language:English
Subjects:
Bismuth halides
Cesium
Crystal structure
Lattice vacancies
Nanocrystals
Optical properties
Photoluminescence
Precursors
Seeds
Vacancies
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Summary:Perovskite-phase cesium bismuth halide (Cs3Bi2X9; X = Cl, Br, I) nanocrystals were synthesized using a hot-injection approach. These nanocrystals adopted ordered-vacancy perovskite crystal structures and demonstrated composition-tunable optical properties. Growth occurred by initial formation of Bi0 seeds, and morphology was controlled by precursor and seed concentration. The Cs3Bi2I9 nanocrystals demonstrated excellent stability under ambient conditions for several months. Contrary to previous reports, we find that photoluminescence originates from the precursor material as opposed to the Cs3Bi2X9 nanocrystals.
ISSN:1359-7345
1364-548X
DOI:10.1039/c7cc07223f