Chinese Journal of Organic Chemistry ›› 2023, Vol. 43 ›› Issue (2): 573-601.DOI: 10.6023/cjoc202207042 Previous Articles     Next Articles

蓝光热激子材料的研究进展

连铭槟a, 叶泽聪a,*(), 穆英啸a, 胡德华a, 刘源a, 张浩力a,b, 籍少敏a, 霍延平a,*()   

  1. a 广东工业大学轻工化工学院 广州 510006
    b 兰州大学化学化工学院 兰州 730000
  • 收稿日期:2022-07-29 修回日期:2022-09-09 发布日期:2022-10-14
  • 基金资助:
    国家自然科学基金(U2001222); 国家自然科学基金(21975055); 国家自然科学基金(21975053); 广东省自然科学基金(2021A1515110417); 广东省基础与应用基础研究基金(2022B1515020041); 广东省基础与应用基础研究基金(2019B1515120035); 广州市基础研究计划基础与应用基础研究(202102020770)

Progress on Blue-Emitting Hot Exciton Materials

Mingbing Liana, Zecong Yea(), Yingxiao Mua, Dehua Hua, Yuan Liua, Haoli Zhanga,b, Shaomin Jia, Yanping Huoa()   

  1. a School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006
    b School of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou University, Lanzhou 730000
  • Received:2022-07-29 Revised:2022-09-09 Published:2022-10-14
  • Contact: *E-mail: yphuo@gdut.edu.cn;yezecong@gdut.edu.cn
  • Supported by:
    National Natural Science Foundation of China(U2001222); National Natural Science Foundation of China(21975055); National Natural Science Foundation of China(21975053); Natural Science Foundation of Guangdong Province(2021A1515110417); Guangdong Provincial Basic and Applied Basic Research Foundation(2022B1515020041); Guangdong Provincial Basic and Applied Basic Research Foundation(2019B1515120035); Basic and Applied Basic Research Foundation of Guangzhou(202102020770)

In hot exciton materials, the excitons from the high-lying triplet state (Tn, n≥2) can be efficiently converted into the singlet state (Sm, m≥1) via reverse intersystem crossing (RISC) process due to the staggered energy level arrangement, which maximizes the use of the triplet exciton and theoretically achieves a maximum internal quantum efficiency (IQE) of 100%. Hot exciton materials not only break the exciton utilization limitation of traditional fluorescent materials and triplet-triplet annihilation materials, but also overcome the serious efficiency roll-off of thermally activated delayed fluorescent (TADF) materials at high current density, exhibiting unique advantages in the electroluminescence. Blue light has long been the short board of the organic photoelectric full-color display. Compared with the phosphorescent and TADF materials with unsatisfying color purity and inferior stability, hot exciton materials can achieve higher-quality emission in blue devices, exhibiting excellent performance even in the deep-blue region. In this review, the representative blue-emitting hot exciton materials reported recently are summarized, the light-emitting mechanism and design strategy are elaborated, and a full vision of its development is made

Key words: hot exciton, blue emitter, organic electroluminesence, organic light-emitting diodes