Efficient and bright broadband electroluminescence based on environment-friendly metal halide nanoclusters

Dingshuo Zhang; Meiyi Zhu; Yifan He; Qingli Cao; Yun Gao; Hongjin Li; Guochao Lu; Qiaopeng Cui; Yongmiao Shen; Haiping He; Xingliang Dai; Zhizhen Ye

doi:10.1038/s41377-024-01427-z

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Efficient and bright broadband electroluminescence based on environment-friendly metal halide nanoclusters

Article

- Efficient and bright broadband electroluminescence based on environment-friendly metal halide nanoclusters
- Light: Science & Applications Vol. 13, Issue 4, Pages: 727-737(2024)
- Affiliations：
- Author bio：
  
  mshanfeng@zju.edu.cn
  nyezz@zju.edu.cn
- Funds：
- DOI：10.1038/s41377-024-01427-z
  CLC：
- Received：12 October 2023，
  
  Revised：12 March 2024，
  
  Accepted：2024-03-13，
  
  Published Online：07 April 2024，
  
  Published：2024-12
- Accepted：
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Dingshuo Zhang, Meiyi Zhu, Yifan He, et al. Efficient and bright broadband electroluminescence based on environment-friendly metal halide nanoclusters[J]. Light: science & applications, 2024, 13(4): 727-737.
DOI：

Dingshuo Zhang, Meiyi Zhu, Yifan He, et al. Efficient and bright broadband electroluminescence based on environment-friendly metal halide nanoclusters[J]. Light: science & applications, 2024, 13(4): 727-737. DOI： 10.1038/s41377-024-01427-z.

摘要

Abstract

Broadband electroluminescence based on environment-friendly emitters is promising for healthy lighting yet remains an unprecedented challenge to progress. The copper halide-based emitters are competitive candidates for broadband emission

but their high-performance electroluminescence shows inadequate broad emission bandwidt

h of less than 90 nm. Here

we demonstrate efficient ultra-broadband electroluminescence from a copper halide (CuI) nanocluster single emitter prepared by a one-step solution synthesis-deposition process

through dedicated design of ligands and subtle selection of solvents. The CuI nanocluster exhibits high rigidity in the excitation state as well as dual-emissive modes of phosphorescence and temperature-activated delayed fluorescence

enabling the uniform cluster-composed film to show excellent stability and high photoluminescent efficiency. In consequence

ultra-broadband light-emitting diodes (LEDs) present nearly identical performance in an inert or air atmosphere without encapsulation and outstanding high-temperature operation performance

reaching an emission full width at half maximum (FWHM) of ~120 nm

a peak external quantum efficiency of 13%

a record maximum luminance of ~50

000 cd m

−2

and an operating half-lifetime of 137 h at 100 cd m

−2

. The results highlight the potential of copper halide nanoclusters for next-generation healthy lighting.

关键词

Keywords

references

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