High-efficiency crystalline white organic light-emitting diodes

Yijun Liu; Feng Zhu; Yue Wang; Donghang Yan

doi:10.1038/s41377-024-01428-y

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High-efficiency crystalline white organic light-emitting diodes

Article

- High-efficiency crystalline white organic light-emitting diodes
- Light: Science & Applications Vol. 13, Issue 4, Pages: 747-759(2024)
- Affiliations：
- Author bio：
  
  bzhufeng@ciac.ac.cn
- Funds：
- DOI：10.1038/s41377-024-01428-y
  CLC：
- Received：10 October 2023，
  
  Revised：04 February 2024，
  
  Accepted：2024-03-17，
  
  Published Online：08 April 2024，
  
  Published：2024-12
- Accepted：
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Yijun Liu, Feng Zhu, Yue Wang, et al. High-efficiency crystalline white organic light-emitting diodes[J]. Light: science & applications, 2024, 13(4): 747-759.
DOI：

Yijun Liu, Feng Zhu, Yue Wang, et al. High-efficiency crystalline white organic light-emitting diodes[J]. Light: science & applications, 2024, 13(4): 747-759. DOI： 10.1038/s41377-024-01428-y.

摘要

Abstract

Crystalline white organic light-emitting diodes (C-WOLEDs) are promising candidates for lighting and display applications. It is urgently necessary

however

to develop energy-saving and high-efficiency C-WOLEDs that have stable and powerful emission to meet commercial demands. Here

we report a crystalline host matrix (CHM) with embedded nanoaggregates (NA) structure for developing high-performance C-WOLEDs by employing a thermally activated delayed fluorescence (TADF) material and orange phosphorescent dopants (Phos.-D). The CHM-TADFNA-D WOLED exhibit a remarkable EQE of 12.8%

which is the highest performance WOLEDs based on crystalline materials. The device has a quick formation of excitons and a well-designed energy transfer process

and possesses a fast ramping of luminance and current density. Compared to recently reported high-performance WOLEDs based on amorphous material route

the C-WOLED achieves a low series-resistance Joule-heat loss ratio and an enhanced photon output

demonstrating its significant potential in developing the next-generation WOLEDs.

We report a crystalline host matrix with engineered nanoaggregate structure for fabricating high-performance crystalline white OLEDs (C-WOLED)

showing its significant potential in developing the next-generation OLED technology.

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references

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