Issue 37, 2022

Three-dimensional all-inorganic dual halogen emitter Cs2Cd2BrCl5 exhibiting broadband white-light emission

Abstract

Single-component white-light-emitting materials have received increasing attention due to their excellent luminescence properties. Herein, a novel all-inorganic dual halogen emitter Cs2Cd2BrCl5 was successfully synthesized, which features a three-dimensional (3D) network structure. A series of photophysical characterizations show that Cs2Cd2BrCl5 exhibits broadband white-light emission at room temperature with a correlated color temperature (CCT) of 4286 K, a color rendering index (CRI) of 84.6 and a high photoluminescence quantum yield (PLQY) of 20.49%. Temperature-dependent emission spectra, structural distortion analysis of the CdCl3(Br/Cl)3 octahedron, and DFT calculation reveal that the broadband white-light emission of Cs2Cd2BrCl5 originates from self-trapped excitons (STEs). Importantly, Cs2Cd2BrCl5 shows splendid structural and optical stability, which makes it a potential candidate for light-emitting diodes (LEDs). To our knowledge, it is the first example of white-light emission in 3D Cd-based all-inorganic halide materials, which could provide new insight for the further design and synthesis of all-inorganic single-component white-light emitters.

Graphical abstract: Three-dimensional all-inorganic dual halogen emitter Cs2Cd2BrCl5 exhibiting broadband white-light emission

Supplementary files

Article information

Article type
Paper
Submitted
23 dec 2021
Accepted
28 jan 2022
First published
02 feb 2022

J. Mater. Chem. C, 2022,10, 13844-13850

Three-dimensional all-inorganic dual halogen emitter Cs2Cd2BrCl5 exhibiting broadband white-light emission

H. Xu, X. Dong, Z. Zhang, L. Huang, H. Zeng, Z. Lin and G. Zou, J. Mater. Chem. C, 2022, 10, 13844 DOI: 10.1039/D1TC06086D

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