Affiliation:
1. Institute of Optoelectronic Materials and Devices Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and Technology Ganzhou 341000 P. R. China
2. National Rare Earth Function Materials Innovation Center Ganzhou 341100 P. R. China
Abstract
AbstractLead halide perovskites attract tremendous research attention due to excellent optoelectronic properties. However, realizing efficient near ultraviolet (NUV) luminescence with these materials is still a big challenge. Herein, a novel rare‐earth perovskite cesium thulium chloride (CsTmCl3) with high crystallinity has been synthesized via a simple hot‐injection method. The obtained CsTmCl3 microcrystals have a size distribution of around 1–5 µm, and demonstrate a highly efficient NUV emission at 337 nm with a full width at half maximum (FWHM) of 68 nm. The determined band gap of CsTmCl3 microcrystals is ≈3.92 eV, which is supported by theoretical calculations. Moreover, a high photoluminescence quantum yield (PLQY) of up to 12% in NUV region has been achieved in such a lead‐free perovskite. The findings suggest that CsTmCl3 perovskite microcrystal is a promising low‐toxic material for applications in NUV optoelectronic devices.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Jiangxi Province
Jiangxi University of Science and Technology
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
4 articles.
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