Lanthanide complexes with d-f transition: new emitters for single-emitting-layer white organic light-emitting diodes

Peiyu Fang; Peihao Huo; Liding Wang; Zifeng Zhao; Gang Yu; Yanyi Huang; Zuqiang Bian; Zhiwei Liu

doi:10.1038/s41377-023-01211-5

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Lanthanide complexes with d-f transition: new emitters for single-emitting-layer white organic light-emitting diodes

Original Articles

- Lanthanide complexes with d-f transition: new emitters for single-emitting-layer white organic light-emitting diodes
- Light: Science & Applications Vol. 12, Issue 8, Pages: 1623-1632(2023)
- Affiliations：
  
  Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, 100871 Beijing, China
- Author bio：
  
  Zhiwei Liu (zwliu@pku.edu.cn)
- Funds：
- DOI：10.1038/s41377-023-01211-5
  CLC：
- Published：31 August 2023，
  
  Published Online：07 July 2023，
  
  Received：13 February 2023，
  
  Revised：13 June 2023，
  
  Accepted：13 June 2023
- Accepted：
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Fang, P. Y. et al. Lanthanide complexes with d-f transition: new emitters for single-emitting-layer white organic light-emitting diodes. Light: Science & Applications, 12, 1623-1632 (2023).
DOI：

Fang, P. Y. et al. Lanthanide complexes with d-f transition: new emitters for single-emitting-layer white organic light-emitting diodes. Light: Science & Applications, 12, 1623-1632 (2023). DOI： 10.1038/s41377-023-01211-5.

摘要

Abstract

White organic light-emitting diodes (WOLEDs) is a new generation of lighting technology and has stimulated wide-ranging studies. Despite the advantage of simple device structure

single-emitting-layer WOLEDs (SEL-WOLEDs) still face the challenges of difficult material screening and fine energy level regulation. Herein

we report efficient SEL-WOLEDs with a sky-blue emitting cerium(Ⅲ) comp

lex Ce-TBO

2Et

and an orange-red emitting europium(Ⅱ) complex Eu(Tp

2Et

)

as the emitters

showing a maximum external quantum efficiency of 15.9% and Commission Internationale de l'Eclairage coordinates of (0.33

0.39) at various luminances. Most importantly

the electroluminescence mechanism of direct hole capture and hindered energy transfer between the two emitters facilitate a manageable weight doping concentration of 5% for Eu(Tp

2Et

)

avoiding the low concentration (

1%) of the low-energy emitter in typical SEL-WOLEDs. Our results indicate that d-f transition emitters may circumvent fine energy level regulation and provide development potential for SEL-WOLEDs.

关键词

Keywords

references

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