Nearly 100% exciton utilization in highly efficient red OLEDs based on dibenzothioxanthone acceptor

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Xiaoxiao Hu
  • Yuanyuan Qin
  • Zhiyi Li
  • Honglei Gao
  • Teng Gao
  • Guanhao Liu
  • Xiangyu Dong
  • Naxi Tian
  • Xiuxian Gu
  • Pengfei Wang
  • Ying Wang

Detail(s)

Original languageEnglish
Journal / PublicationChinese Chemical Letters
Online published24 Dec 2021
Publication statusOnline published - 24 Dec 2021

Abstract

Improving the utilization of excitons has always been an important topic for the development of electroluminescence devices. In this work, we designed and synthesized three red TADF emitters TPA-DBT12, TPA-DBT3 and DTPA-DBT by employing dibenzothioxanthone (DBT) acceptor framework to stabilize the locally excited triplet state to participate in the reverse intersystem crossing (RISC) process. The fast RISC process and singlet radiation decay process gave rise to evidently enhanced exciton utilization. All of the red OLEDs based on these materials showed maximum EQE over 11% and high exciton utilization close to 100%. This work not only extend the acceptor framework for red materials but also provide a new perspective for the design of highly efficient red TADF materials with 100% exciton utilization by managing locally excited triplet state.

Research Area(s)

  • Exciton utilization, Locally excited triplet state, Organic light-emitting diode, Red light, Thermally activated delayed fluorescence

Citation Format(s)

Nearly 100% exciton utilization in highly efficient red OLEDs based on dibenzothioxanthone acceptor. / Hu, Xiaoxiao; Qin, Yuanyuan; Li, Zhiyi; Gao, Honglei; Gao, Teng; Liu, Guanhao; Dong, Xiangyu; Tian, Naxi; Gu, Xiuxian; Lee, Chun-Sing; Wang, Pengfei; Wang, Ying.

In: Chinese Chemical Letters, 24.12.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review