Acta Chimica Sinica ›› 2021, Vol. 79 ›› Issue (5): 557-574.DOI: 10.6023/A21010009 Previous Articles     Next Articles



周涛a, 钱越a, 王宏健a, 冯全友a,*(), 解令海a,*(), 黄维a,b   

  1. a 南京邮电大学信息材料与纳米技术研究院 有机电子与信息显示国家重点实验室 南京 210023
    b 西北工业大学柔性电子前沿科学中心 柔性电子材料与器件工信部重点实验室 西安 710072
  • 投稿日期:2021-01-13 发布日期:2021-02-26
  • 通讯作者: 冯全友, 解令海
  • 作者简介:

    周涛, 南京邮电大学信息材料与纳米技术研究院/材料科学与工程学院2019级研究生, 导师为冯全友副教授. 主要从事有机发光材料的设计合成及其性能研究.

    冯全友, 南京邮电大学材料科学与工程学院副教授、硕士生导师. 2005至2009年就读于西南大学化学与化工学院, 获得学士学位. 2009至2014年就读于复旦大学先进材料实验室, 获得博士学位 (导师: 周刚教授、王忠胜教授). 随后加入南京邮电大学信息材料与纳米技术研究院/材料科学与工程学院. 2015至2017年在弗吉尼亚理工大学从事博士后研究 (导师: Tong Rong教授). 目前主要研究方向为有机/聚合物宽带隙半导体材料及其光电子器件.

    解令海, 南京邮电大学信息材料与纳米技术研究院/材料科学与工程学院教授、博士生导师, 国家自然科学基金优秀青年科学基金获得者. 2000年和2003年分别获得东北师范大学学士学位和汕头大学硕士学位. 2003至2006年就读于复旦大学先进材料研究院, 获得博士学位(导师: 黄维院士). 长期从事多功能有机半导体材料的设计合成及其在有机发光、有机激光、有机存储和忆阻器等领域的应用研究.

  • 基金资助:
    项目受江苏省自然科学基金(BK20190090); 国家自然科学基金(21774061)

Recent Advances in Substituent Effects of Blue Thermally Activated Delayed Fluorescence Small Molecules

Tao Zhoua, Yue Qiana, Hongjian Wanga, Quanyou Fenga,*(), Linghai Xiea,*(), Wei Huanga,b   

  1. a State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing 210023, China
    b Frontiers Science Center for Flexible Electronics (FSCFE), MIIT Key Laboratory of Flexible Electronics (KLoFE), Northwestern Polytechnical University, Xi'an 710072, China
  • Received:2021-01-13 Published:2021-02-26
  • Contact: Quanyou Feng, Linghai Xie
  • About author:
  • Supported by:
    Natural Science Foundation of Jiangsu Province(BK20190090); National Natural Science Foundation of China(21774061)

As the third-generation emitters for organic light-emitting diodes (OLED), thermally activated delayed fluorescence (TADF) materials have attracted widespread attention from both academic and industrial communities in recent years. In TADF molecules, the triplet excitons can be upconverted to the singlet state with the aid of ambient thermal energy by virtue of the reverse intersystem crossing (RISC) owing to the small singlet-triplet splitting energy (ΔEST). Therefore, 100% exciton utilization efficiency can be theoretically realized by harvesting both singlet and triplet excitons. Consequently, the external quantum efficiencies of OLEDs can be significantly improved compared with the first-generation devices based on conventional fluorophores. TADF materials are regarded as an effective potential solution to break through the bottleneck of highly efficient and stable blue organic electroluminescence (EL). Generally, TADF molecules is a purely organic push and pull system containing at least an electronic donor and acceptor. The Δ EST, frontier orbital distributions, aggregation structures, EL colors and device performance can be effectively tuning by changing the structures and quantities of the donor and the acceptor, the substituents and their substituted positions. Meanwhile, the substituents of TADF molecules play a crucial role in the regulation of the strengths of donor and acceptor, molecular configurations, aggregation structures, stabilities and other physical and chemical properties. The substituent effects of purely organic blue TADF molecules from D-A type and multiple-resonance type blue TADF molecules are summarized, in the hope of providing effective reference for the design and synthesis of high-efficiency and stable blue light TADF molecules.

Key words: blue emitter, thermally activated delayed fluorescence, small molecule, substituent, OLED