Highly luminescent cesium lead halide perovskite nanocrystals with tunable composition and thickness by ultrasonication

Tong, Y. et al. (2016) Highly luminescent cesium lead halide perovskite nanocrystals with tunable composition and thickness by ultrasonication. Angewandte Chemie (International Edition), 55(44), pp. 13887-13892. (doi: 10.1002/anie.201605909) (PMID:27690323)

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We describe the simple, scalable, single‐step, and polar‐solvent‐free synthesis of high‐quality colloidal CsPbX3 (X=Cl, Br, and I) perovskite nanocrystals (NCs) with tunable halide ion composition and thickness by direct ultrasonication of the corresponding precursor solutions in the presence of organic capping molecules. High angle annular dark field scanning transmission electron microscopy (HAADF‐STEM) revealed the cubic crystal structure and surface termination of the NCs with atomic resolution. The NCs exhibit high photoluminescence quantum yields, narrow emission line widths, and considerable air stability. Furthermore, we investigated the quantum size effects in CsPbBr3 and CsPbI3 nanoplatelets by tuning their thickness down to only three to six monolayers. The high quality of the prepared NCs (CsPbBr3) was confirmed by amplified spontaneous emission with low thresholds. The versatility of this synthesis approach was demonstrated by synthesizing different perovskite NCs.

Item Type:Articles
Additional Information:This work was supported by the Bavarian State Ministry of Science, Research, and Arts through the grant “Solar Technologies go Hybrid (SolTech)”, the China Scholarship Council (Y.T.), the Alexander von Humboldt‐Stiftung (L.P.), the European Union through the award of a Marie Curie Intra‐European Fellowship (P.D.), the Scientific and Technological Research Council of Turkey (M.A.), the Flemish Fund for Scientific Research (FWO Vlaanderen; E.B.), and the European Research Council (S.B.; ERC Starting Grant 335078‐COLOURATOMS).
Glasgow Author(s) Enlighten ID:Docampo, Dr Pablo
Authors: Tong, Y., Bladt, E., Aygüler, M. F., Manzi, A., Milowska, K. Z., Hintermayr, V. A., Docampo, P., Bals, S., Urban, A. S., Polavarapu, L., and Feldmann, J.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Angewandte Chemie (International Edition)
Publisher:Wiley - V C H Verlag GmbH & Co. KGaA
ISSN (Online):1521-3773
Published Online:30 September 2016

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