Chinese Journal of Organic Chemistry ›› 2024, Vol. 44 ›› Issue (8): 2513-2522.DOI: 10.6023/cjoc202403047 Previous Articles     Next Articles

ARTICLES

以二苯基硅杂吖啶为电子给体的蓝色聚集诱导延迟荧光材料

何俊初a, 伍俊琪a, 王江辉a, 徐静文a, 唐本忠b, 赵祖金a,*()   

  1. a 华南理工大学 发光材料与器件国家重点实验室 广州 510640
    b 香港中文大学(深圳)理工学院 广东深圳 518172
  • 收稿日期:2024-03-28 修回日期:2024-06-20 发布日期:2024-07-02
  • 作者简介:
    † 共同第一作者.
  • 基金资助:
    国家自然科学基金(U23A20594); 国家自然科学基金(22375066); 广东省基础与应用基础研究基金(2023B1515040003); 广东省基础与应用基础研究基金(2022A1515010315); 广东省基础与应用基础研究基金(2021A1515110826); 广州市科技计划(202201010439)

Blue Aggregation-Induced Delayed Fluorescence Materials with 5,10-Dihydrodibenzo[b,e][1,4]azasiline as Donor

Junchu Hea, Junqi Wua, Jianghui Wanga, Jingwen Xua, BenZhong Tangb, Zujin Zhaoa()   

  1. a State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640
    b School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172
  • Received:2024-03-28 Revised:2024-06-20 Published:2024-07-02
  • Contact: E-mail: mszjzhao@scut.edu.cn
  • About author:
    † These authors contributed equally to this work.
  • Supported by:
    National Natural Science Foundation of China(U23A20594); National Natural Science Foundation of China(22375066); Guangdong Basic and Applied Basic Research Foundation(2023B1515040003); Guangdong Basic and Applied Basic Research Foundation(2022A1515010315); Guangdong Basic and Applied Basic Research Foundation(2021A1515110826); Guangzhou Science and Technology Planning Project(202201010439)

Three blue-emitting materials were developed using 10,10-diphenyl-5,10-dihydrodibenzo[b,e][1,4]azasiline (DPDBA) and carbazole derivative as donors, and benzophenone as acceptor to construct donor-acceptor-donor (D-A-D') type molecules, and their thermal stability, electrochemical properties, single crystal structure, photophysical properties and electroluminescence properties were systematically studied. And they have small singlet-triplet energy splitting and microsecond- scale delayed lifetimes, showing obvious aggregation-induced delayed fluorescence (AIDF) characteristics. As light-emitting layers of organic light-emitting diodes (OLEDs), the electroluminescence peaks of these compounds are in the range of 474~ 476 nm, and the maximum external quantum efficiency (EQE) can reach 14.8%. Additionally, these compounds exhibit good bipolar carrier transport performance, and can be used as host materials for phosphorescent devices. The maximum EQEs of green and yellow phosphorescent OLEDs are 25.5% and 21.2%, respectively, and the efficiency roll-off at 1000 cd•m-2 is very small. These results indicate that these AIDF compounds can be used not only as luminescent materials but also as host materials for the preparation of high-performance

Key words: organic light-emitting diode (OLED), aggregation-induced delayed fluorescence (AIDF), host material, aggregation-induced emission