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

TitleSynthesis and optical properties of ordered-vacancy perovskite cesium bismuth halide nanocrystals
Publication TypeJournal Article
Year of Publication2018
AuthorsNelson, RD, Santra, K, Wang, Y, Hadi, A, Petrich, JW, Panthani, MG
JournalChemical Communications
Volume54
Pagination3640-3643
Date Published04
Type of ArticleArticle
ISBN Number1359-7345
Accession NumberWOS:000429526400018
Keywordsanion-exchange, chemistry, degradation, efficient, iodide, lead-free, performance, photovoltaic applications, quantum dots, single-crystals, solar-cells
Abstract

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.

DOI10.1039/c7cc07223f
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