Lead-free Cesium Europium Halide Perovskite Nanocrystals.

Author(s) Huang, J.; Lei, T.; Siron, M.; Zhang, Y.; Yu, S.; Seeler, F.; Dehestani, A.; Quan, L.Na; Schierle-Arndt, K.; Yang, P.
Journal Nano Lett
Date Published 2020 May 13

Because of the toxicity of lead, searching for a lead-free halide perovskite semiconducting material with comparable optical and electronic properties is of great interest. Rare-earth-based halide perovskite represents a promising class of materials for this purpose. In this work, we demonstrate the solution-phase synthesis of single-crystalline CsEuCl nanocrystals with a uniform size distribution centered around 15 nm. The CsEuCl nanocrystals have photoluminescence emission centered at 435 nm, with a full width at half-maximum of 19 nm. Furthermore, CsEuCl nanocrystals can be embedded in a polymer matrix that provides enhanced stability under continuous laser irradiation. Lead-free rare-earth cesium europium halide perovskite nanocrystals represent a promising candidate to replace lead halide perovskites.

DOI 10.1021/acs.nanolett.0c00692
ISSN 1530-6992
Citation Nano Lett. 2020;20(5):37343739.

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