Simultaneous delayed fluorescence and phosphorescence in organic luminescent material employing multiple excited states

Dehai Dou; Wenlan Liu; Xin Zhou; Qiqi Yang; Xiao Tan; Naz Ugur; Chongyao Li; Charusheela Ramanan; Xiaomin Liu; Gert-Jan A. H. Wetzelaer; Denis Andrienko; Martin Baumgarten; Paul W. M. Blom; Yungui Li

doi:10.1038/s41377-025-02063-x

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Simultaneous delayed fluorescence and phosphorescence in organic luminescent material employing multiple excited states

Original Articles

- Simultaneous delayed fluorescence and phosphorescence in organic luminescent material employing multiple excited states
- Simultaneous delayed fluorescence and phosphorescence in organic luminescent material employing multiple excited states
- Light: Science & Applications 2026年15卷第1期页码：151-166
- Affiliations：
  
  Max Planck Institute for Polymer Research, Mainz, Germany
- Author bio：
  
  Martin Baumgarten (martin.baumgarten@mpip-mainz.mpg.de)
  Paul W. M. Blom (blom@mpip-mainz.mpg.de)
  Yungui Li (yungui.li@mpip-mainz.mpg.de)
- Funds：
- DOI：10.1038/s41377-025-02063-x
  中图分类号：
- 收稿：2025-05-14，
  
  修回：2025-09-12，
  
  录用：2025-09-17，
  
  网络出版：2026-01-01，
  
  纸质出版：2026-01-31
- Accepted：
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Dehai Dou, Wenlan Liu, Xin Zhou, 等. Simultaneous delayed fluorescence and phosphorescence in organic luminescent material employing multiple excited states[J]. Light: Science & Applications, 2026,15(1):151-166.

Dou, D. H. et al. Simultaneous delayed fluorescence and phosphorescence in organic luminescent material employing multiple excited states. Light: Science & Applications, 15, 151-166 (2026).
Dehai Dou, Wenlan Liu, Xin Zhou, 等. Simultaneous delayed fluorescence and phosphorescence in organic luminescent material employing multiple excited states[J]. Light: Science & Applications, 2026,15(1):151-166. DOI： 10.1038/s41377-025-02063-x.

Dou, D. H. et al. Simultaneous delayed fluorescence and phosphorescence in organic luminescent material employing multiple excited states. Light: Science & Applications, 15, 151-166 (2026). DOI： 10.1038/s41377-025-02063-x.

摘要

Abstract

Triplet dynamics play a key role in room temperature phosphorescence (RTP) and thermally activated delayed fluorescence (TADF). In this work

we report a model emitter with three emission components: prompt fluorescence (PF) in nanoseconds

delayed fluorescence in microseconds

and RTP in milliseconds

with the emission spectrum ranging from ultraviolet to deep blue. We experimentally and theoretically verify that a second triplet excited state

below the singlet state S

is involved in facilitating simultaneous PF

TADF

and RTP in the model emitter. The reverse intersystem crossing (rISC) from T

to S

contributes to the TADF

while the radiative transition from T

to the ground state is the origin of the long-lived RTP. By transferring the energy of multiple excited states to a series of conventional fluorescence emitters

a multi-color emissive system covering the entire visible wavelength range has been realized

with the photoluminescence decay ranging from 10

−9

s to 10

−1

s. By slightly tuning the energy difference between these excited states in the model molecule

a highly efficient organic luminescent material with only PF and RTP emission has been obtained with an RTP quantum yield above 30%. This work provides insights into the key role of higher-lying triplet states in the development of efficient TADF and RTP materials.

关键词

Keywords

references

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