Management of triplet excitons transition: fine regulation of Förster and dexter energy transfer simultaneously

Jiaqiang Wang; Yujie Yang; Xinnan Sun; Xiaoning Li; Liyao Zhang; Zhen Li

doi:10.1038/s41377-023-01366-1

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Management of triplet excitons transition: fine regulation of Förster and dexter energy transfer simultaneously

Original Articles

- Management of triplet excitons transition: fine regulation of Förster and dexter energy transfer simultaneously
- Light: Science & Applications Vol. 13, Issue 2, Pages: 302-315(2024)
- Affiliations：
  
  1.Institute of Molecular Aggregation Science, Tianjin University, Tianjin 300072, China
  2.School of Life Sciences, Tianjin University, Tianjin 300072, China
  3.Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials, Department of Chemistry, Wuhan University, Wuhan 430072, China
  4.Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430072, China
  5.Joint School of National University of Singapore, Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, China
- Author bio：
  
  Liyao Zhang (lyzhang26@whu.edu.cn)
  Zhen Li (lizhen@whu.edu.cn)
- Funds：
- DOI：10.1038/s41377-023-01366-1
  CLC：
- Received：29 September 2023，
  
  Revised：18 December 2023，
  
  Accepted：2023-12-19，
  
  Published Online：30 January 2024，
  
  Published：29 February 2024
- Accepted：
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Wang, J. Q. et al. Management of triplet excitons transition: fine regulation of Förster and dexter energy transfer simultaneously. Light: Science & Applications, 13, 302-315 (2024).
DOI：

Wang, J. Q. et al. Management of triplet excitons transition: fine regulation of Förster and dexter energy transfer simultaneously. Light: Science & Applications, 13, 302-315 (2024). DOI： 10.1038/s41377-023-01366-1.

摘要

Abstract

Understanding and management of triplet excitons transition in the same molecule remain a great challenge. Hence

for the first time

by host engineering

manageable transitions of triplet excitons in a naphthalimide derivative

NDOH

were achieved

and monitored through the intensity ratio (I

TADF

RTP

) between thermally activated delayed fluorescence (TADF) and room-temperature phosphorescence (RTP). Energy differences between lowest triplet excited states of host and guest were changed from 0.03 to 0.17 eV

and I

TADF

RTP

NDOH

decreased by 200 times

thus red shifting the afterglow color. It was proposed that shorter conjugation length led to larger band gaps of host materials

thus contributing to efficient Dexter and inefficient Förster energy transfer. Interestingly

no transition to singlet state and only strongest RTP

with quantum yield of 13.9% could be observed

when

PBNC

with loosest stacking and largest band gap acted as host. This work provides novel insight for the management and prediction of triplet exciton transitions and the development of smart afterglow materials.

关键词

Keywords

references

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