Promising interlayer sensitization strategy for the construction of high-performance blue hyperfluorescence OLEDs

Jianghui Wang; Peng Zou; Letian Chen; Zhentao Bai; Hao Liu; Wen-Cheng Chen; Yanping Huo; Ben Zhong Tang; Zujin Zhao

doi:10.1038/s41377-024-01490-6

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Promising interlayer sensitization strategy for the construction of high-performance blue hyperfluorescence OLEDs

Original Articles

- Promising interlayer sensitization strategy for the construction of high-performance blue hyperfluorescence OLEDs
- Light: Science & Applications Vol. 13, Issue 7, Pages: 1372-1382(2024)
- Affiliations：
  
  1.State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou 510640, China
  2.School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
  3.School of Science and Engineering, Shenzhen Institute of Aggregate Science and Technology, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, China
- Author bio：
  
  Zujin Zhao (mszjzhao@scut.edu.cn)
- Funds：
- DOI：10.1038/s41377-024-01490-6
  CLC：
- Published：31 July 2024，
  
  Published Online：13 June 2024，
  
  Received：14 December 2023，
  
  Revised：09 May 2024，
  
  Accepted：20 May 2024
- Accepted：
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Wang, J. H. et al. Promising interlayer sensitization strategy for the construction of high-performance blue hyperfluorescence OLEDs. Light: Science & Applications, 13, 1372-1382 (2024).
DOI：

Wang, J. H. et al. Promising interlayer sensitization strategy for the construction of high-performance blue hyperfluorescence OLEDs. Light: Science & Applications, 13, 1372-1382 (2024). DOI： 10.1038/s41377-024-01490-6.

摘要

Abstract

Multi-resonance thermally activated delayed fluorescence (MR-TADF) materials are promising candidates for organic light-emitting diodes (OLEDs) with narrow electroluminescence (EL) spectra. Current researches focus on fabricating hyperfluorescence OLEDs to improve EL efficiencies of MR-TADF emitters by co-doping them with TADF sensitizers in a single host layer. However

in many cases

the polarity of the single host could be not suitable for both blue MR-TADF emitters and blue TADF sensitizers

resulting in broadened EL spectra in high-polar hosts or decreased EL efficiencies in low-polar hosts. Herein

we wish to report an efficient sensitization strategy for blue MR-TADF emitters by constructing an interlayer-sensitizing configuration

in which the blue TADF sensitizers and blue MR-TADF emitters are separated into two closely aligned host layers with high polarity and low polarity

respectively. Based on this strategy

efficient blue hyperfluorescence OLEDs are realized and verified by employing various TADF sensitizers and different MR-TADF emitters

furnishing outstanding external quantum efficiencies of up to 38.8% and narrow EL spectra. These results validate the feasibility and universality of this interlayer sensitization strategy

which provides an effective alternative to high-performance blue hyperfluorescence OLEDs.

关键词

Keywords

references

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