Iridium Phosphorescent Complexes Based on Modified Phenylquinoline Ligand and Their High-efficiency Pure Red Organic Electroluminescent Device

被引：0

作者：

Chang Q.-W. ^{[1
,2
]}

Chen Z.-A. ^{[1
]}

Wang Z.-A. ^{[1
]}

Jiang J. ^{[1
]}

Yu J. ^{[1
]}

Liu W.-P. ^{[1
]}

Yan C.-X. ^{[1
]}

Chen L. ^{[1
]}

机构：

[1] State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming

[2] Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming

来源：

Faguang Xuebao/Chinese Journal of Luminescence | 2022年 / 43卷 / 10期

基金：

中国国家自然科学基金;

关键词：

high efficiency; iridium complexes; luminescent property; phosphorescent materials; red OLED;

D O I：

10.37188/CJL.20220134

中图分类号：

学科分类号：

摘要：

Two iridium phosphorescent complexes were synthesized by using the modified 2，4-2R-phenyl-4-methylquinoline as the main ligands. Methyl or methoxy was introduced in the positions 2 and 4 with small steric hindrance of phenyl. Their compositions and chemical structures of the complexes were characterized by elemental analysis， nuclear magnetic resonance spectroscopy and single crystal X-ray diffraction. The （2，4-2Me-mpq）2Ir（acac） and （2，4-2MeO-mpq）2Ir（acac） with the photoluminescence quantum yields of 75% and 80% exhibit maximum emission peaks at 610 nm and 580 nm， respectively. The HOMO-LUMO energy levels difference of the two complexes are 2.04 eV and 2.19 eV， respectively. Using （2，4-2Me-mpq）2Ir（acac） as the guest material， the high-efficiency pure red OLED with structure ITO/TAPC（30 nm）/CBP∶（2，4-2Me-mpq）2Ir（acac）（30 nm）∶x%/TPBi（30 nm）/Liq（2 nm）/Al was prepared with different doping concentrations. At the optimal doping concentration of 10%， the device based on （2，4-2Me-mpq）2Ir（acac） exhibited a red emission at 607 nm with CIE（0.63， 0.37）， a luminance of 25 980 cd/m2， a maximum current efficiency of 23.11 cd/A and a maximum external quantum efficiency（EQE） of 20.28%， respectively. © 2022 Chines Academy of Sciences. All rights reserved.

引用

页码：1583 / 1591

页数：8

共 37 条

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