Chinese Journal of Organic Chemistry ›› 2022, Vol. 42 ›› Issue (5): 1423-1430.DOI: 10.6023/cjoc202112039 Previous Articles     Next Articles



聂飞a, 黄观波b, 戴雷b, 陈少福b, 籍少敏a, 陈嘉雄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:2021-12-28 修回日期:2022-01-27 发布日期:2022-02-27
  • 通讯作者: 陈嘉雄, 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); 国家自然科学基金(21975053)

Synthesis and Electroluminescent Properties of Red-Emitting Iridium Complexes Based on Benzofuran-Isoquinoline

Fei Niea, Guanbo Huangb, Lei Daib, Shaofu Chenb, Shaomin Jia, Jiaxiong Chena(), Yanping Huoa()   

  1. a School of Light Industry and Chemical Engineering, Guangdong University of Technology, Guangzhou 510006
    b Guangdong Aglaia Optoelectronic Materials Co. Ltd., Foshan, Guangdong 528300
  • Received:2021-12-28 Revised:2022-01-27 Published:2022-02-27
  • Contact: Jiaxiong Chen, Yanping Huo
  • Supported by:
    Natural Science Foundation of China(U2001222); Natural Science Foundation of China(21975055); Natural Science Foundation of China(21975053)

Three red iridium complexes were designed and synthesized by employing 6-isopropyl-1-(5-methylbenzofuran-7- yl)isoquinoline, 6-cyclopentyl-1-(5-methylbenzofuran-7-yl)isoquinoline and 6-isobutyl-1-(5-methylbenzofuran-7-yl)isoquinoline as main ligands, respectively, and 3,7-diethyl-4,6-nonedione as the auxiliary ligand. Their photophysical, thermal and electrochemical properties were investigated. These complexes have higher photoluminescence quantum yields and shorter phosphorescent lifetime. Three organic electroluminescent devices with same structure were fabrication using the iridium complexes as emitters. They all exhibited red electroluminescent emission with peak values at 637, 635 and 636 nm, respectively and showed low turn-on voltages below 2.8 V. And the highest external quantum efficiency of three devices was 14.1%, 13.4% and 13.3%, the highest current efficiency was 7.0, 7.4 and 7.0 cd/A, and the highest power efficiency was 7.9, 8.3, and 7.8 lm/W, respectively. These data indicate that the three iridium complexes can be used as efficient red phosphorescent materials.

Key words: iridium complex, phosphorescent lifetime, external quantum efficiency