基于苯并呋喃-异喹啉的红光铱配合物的合成及电致发光性质
收稿日期: 2021-12-28
修回日期: 2022-01-27
网络出版日期: 2022-02-18
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
Received date: 2021-12-28
Revised date: 2022-01-27
Online published: 2022-02-18
Supported by
Natural Science Foundation of China(U2001222); Natural Science Foundation of China(21975055); Natural Science Foundation of China(21975053)
分别以6-异丙基-1-(5-甲基苯并呋喃-7-基)异喹啉、6-环戊基-1-(5-甲基苯并呋喃-7-基)异喹啉和6-异丁基-1-(5-甲基苯并呋喃-7-基)异喹啉为主配体, 以3,7-二乙基-4,6-壬二酮为辅助配体, 设计合成了三个红光铱配合物. 测试了它们的光物理、热学和电化学性质, 这些配合物具有较高的光致发光量子产率以及较短的磷光寿命. 以所合成的铱配合物为客体材料, 制备了三个相同结构的有机电致发光器件. 三个器件都实现了红光发射, 峰值分别位于637、635和636 nm处. 它们的开启电压较低, 均不超过2.8 V, 对应的最高外量子效率分别为14.1%、13.4%和13.3%, 最高电流效率分别为7.0、7.4和7.0 cd/A, 最高功率效率分别为7.9、8.3和7.8 lm/W. 这些数据表明所合成的三个铱配合物均为性能较好的红光磷光材料.
聂飞 , 黄观波 , 戴雷 , 陈少福 , 籍少敏 , 陈嘉雄 , 霍延平 . 基于苯并呋喃-异喹啉的红光铱配合物的合成及电致发光性质[J]. 有机化学, 2022 , 42(5) : 1423 -1430 . DOI: 10.6023/cjoc202112039
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.
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