Organic cations directed 1D [Pb 3 Br 10 ] 4− chains: syntheses, crystal structures, and photoluminescence properties

Recently, low-dimensional organic–inorganic hybrid metal halides have attracted considerable attention in solid-state optical application fields, especially in white-light emitting diodes (WLEDs) owing to intrinsic broadband luminescence performances. Herein, by selecting different types of organic...

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Bibliographic Details
Published in:CrystEngComm 2021-01, Vol.23 (2), p.292-298
Main Authors: Jing, Chang-Qing, Li, Jing-Zhao, Xu, Te, Jiang, Kuan, Zhao, Xue-Jie, Wu, Yu-Fang, Xue, Nian-Ting, Jing, Zhi-Hong, Lei, Xiao-Wu
Format: Article
Language:English
Subjects:
Broadband
Cations
Chains
Crystal lattices
Crystal structure
Crystallography
Excitons
Halides
Homology
Light
Light emission
Light emitting diodes
Metal halides
Photoluminescence
Quantum efficiency
Trimers
White light
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Summary:Recently, low-dimensional organic–inorganic hybrid metal halides have attracted considerable attention in solid-state optical application fields, especially in white-light emitting diodes (WLEDs) owing to intrinsic broadband luminescence performances. Herein, by selecting different types of organic cations as a structural decoration strategy, we designed a series of new 1D hybrid halides of A 2 Pb 3 Br 10 (A = NPM, DMPDA, TMEN) based on same [Pb 3 Br 10 ] 4− chains composed of edge-shared [Pb 3 Br 12 ] 6− trimers. The low-dimensional crystal lattice results in the formation of self-trapped excitons, which leads to broadband light emissions covering the entire visible region for all A 2 Pb 3 Br 10 homologues. Specifically, compound 1 exhibits yellowish-white light emission (0.34, 0.45) with a photoluminescence quantum efficiency of 2.51%. Both compounds 2 and 3 show bluish-white light emissions centered at 438 nm and 440 nm, respectively, with high color rendering index (CRI) of 96, which belongs to one of the highest values to date. The intrinsic broadband white light emissions enable them as promising candidates for single-component white-light emitting materials.
ISSN:1466-8033
1466-8033
DOI:10.1039/D0CE01457E