Chinese Journal of Organic Chemistry ›› 2023, Vol. 43 ›› Issue (5): 1799-1807.DOI: 10.6023/cjoc202301021 Previous Articles     Next Articles

Special Issue: 有机硼化学专辑

ARTICLES

基于四氢喹啉的多重共振热活化延迟荧光材料的设计、合成及电致发光性能研究

梁凯淳a, 白科研b, 戴雷b, 刘源a, 叶泽聪a,*(), 霍延平a,*()   

  1. a 广东工业大学轻工化工学院 广州 510006
    b 广东阿格蕾雅光电材料有限公司 广东佛山 528300
  • 收稿日期:2023-01-24 修回日期:2023-03-06 发布日期:2023-03-30
  • 通讯作者: 叶泽聪, 霍延平
  • 基金资助:
    国家自然科学基金(U2001222); 国家自然科学基金(21975055); 广东省基础与应用基础研究基金(2019B1515120035)

Design, Synthesis and Electroluminescent Properties of Multiresonant Thermally Activated Delayed Fluorescence Materials Based on Tetrahydroquinoline

Kaichun Lianga, Keyan Baib, Lei Daib, Yuan Liua, Zecong Yea(), Yanping Huoa()   

  1. a School of Chemistry and Chemical Engineering, Guangdong University of Technology, Guangzhou 510006
    b Guangdong Aglaia Optoelectronic Materials Co. Ltd., Foshan, Guangdong 528300
  • Received:2023-01-24 Revised:2023-03-06 Published:2023-03-30
  • Contact: Zecong Ye, Yanping Huo
  • Supported by:
    National Natural Science Foundation of China(U2001222); National Natural Science Foundation of China(21975055); Guangdong Basic and Applied Basic Research Foundation(2019B1515120035)

Multiresonant thermally activated delayed fluorescence (MR-TADF) materials are a series of hot materials to realize ultra-high definition organic light-emitting diode (OLED) display. 5,9-Bis(1,2,3,4-tetrahydroquinoline)-5,9-dihydro-5,9- diaza-13b-boranaphtho[3,2,1-de]anthracene (THQBN) and 7-(tert-butyl)-5,9-bis(6-(tert-butyl)-4,4-dimethyl-1,2,3,4-tetra- hydroquinoline)-5,9-dihydro-5,9-diaza-13b-boranaphtho[3,2,1-de]anthracene (Tt-THQBN) were designed and synthesized as organoboron based MR-TADF based on tetrahydroquinoline, whose structures were characterized by nuclear magnetic resonance and mass spectrum. The thermal stabilities, electrochemical properties and photophysical properties of these two molecules were measured. They had the similar deep-blue photoluminescence, narrow full-width at half-maximum and high photoluminescence quantum yield with the classical MR-TADF molecules. OLED devices were fabricated employing THQBN and Tt-THQBN as the guest materials. They all had deep blue emission at 455~458 nm. The CIE-y values of devices 2~4 are less than 0.1, and the full width of half maximum (FWHMs) of all devices were narrow, whitin the range of 34~38 nm. Their maximum brightness can exceed 1000 cd•m–2 without serious efficiency roll-down. The device lifetime LT90 of device 3 with best performance in these devices can reach 99 h at the initial brightness of 1000 cd•m–2.

Key words: multiresonant thermally activated delayed fluorescence, organoboron based compound, full-width at half- maximum, device lifetime