氮杂环苯基吡啶类铱配合物的合成及其器件性能
Synthesis and device properties of azeticyclic phenylpyridine iridium complexes
潘露露 1杭德余 2陈婷 2温洁 2向陆军 2钱家盛1
作者信息
- 1. 安徽大学 化学化工学院,安徽 合肥 230601
- 2. 北京燕化集联光电技术有限公司,北京 102422
- 折叠
摘要
通过引入苯基吡啶,对 2-甲基苯并呋喃并[2,3-b]吡啶-8-硼酸酯(Ⅱ)进行修饰,并对辅助配体进行部分氘代,同时对 5-甲基-2-对甲苯基吡啶主配体的两个甲基进行全氘代,分别合成了 2 种铱配合物,双[5-甲基-2-(4-甲基苯基)吡啶基-N,C2]{2-[7-(6-苯基吡啶-2-基)二苯并呋喃-4-基]-4-苯基吡啶}合铱(Ⅳ)和双{5-(甲基-d3)-2-[4-(甲基-d3)苯基]吡啶基-N,C2}[2-{7-[6-(甲基-d3)吡啶-2-基]二苯并呋喃-4-基}-4-(苯基-d5)吡啶]合铱(Ⅳ-d20).采用 1HNMR、HRMS、元素分析仪对其结构进行了表征与确认.利用UV-Vis光谱、荧光发射光谱(PL)和循环伏安法对其光物理性质及能级结构进行了测试,以铱配合物Ⅳ和Ⅳ-d20 为客体制备了器件,并评价了其性能.结果表明,铱配合物Ⅳ和Ⅳ-d20的光致发光光谱发射波长分别为546.9和548.0 nm,均是潜在的黄绿色磷光材料.铱配合物Ⅳ-d20 在电致发光下表现出更优异的器件性能.基于铱配合物(MMppy-d6)2Ir(MPPBFP-d8)的器件发射波长为 552 nm,色坐标为(0.43,0.56),最大电流效率为 97.49 cd/A,最大外量子效率为 26.83%.
Abstract
By introducing phenylpyridine to modify 2-methylbenzofuran[2,3-b]pyridine-8-boronate(Ⅱ)and partially deuterizing the auxiliary ligand while fully deuterizing two methyl groups of 5-methyl-2-p-tolylpyridine main ligand,two iridium complexes,bis[5-methyl-2-(4-methylphenyl)pyridyl-N,C2]{2-[7-(6-phenylpyridin-2-yl)dibenzofuran-4-yl]-4-phenylpyridine}iridium(Ⅳ)and bis{5-(methyl-d3)-2-[4-(methyl-d3)phenyl]pyridyl-N,C2}[2-{7-[6-(methyl-d3)pyridin-2-yl]dibenzofuran-4-yl}-4-(phenyl-d5)pyriridine]iridium(Ⅳ-d20),were synthesized,with the structures characterized and confirmed by 1HNMR,HRMS,and elemental analyzer.The photophysical properties and energy level structure were then characterized by UV-Vis spectroscopy,fluorescence emission spectroscopy(PL)and cyclic voltammetry.Devices were constructed with iridium complexes Ⅳ and Ⅳ-d20 as guests,and their performance was evaluated.The results showed that iridium complexes Ⅳ and Ⅳ-d20 displayed photoluminescence spectral emission wavelengths of 546.9 and 548.0 nm,respectively,indicating potential yellow-green phosphorescent materials.Iridium complexes Ⅳ-d20 exhibited better device performance under electroluminescence.The device constructed with iridium complex Ⅳ-d20 showed an emission wavelength of 552 nm,color coordinate of(0.43,0.56),maximum current efficiency of 97.49 cd/A,and maximum external quantum efficiency of 26.83%.
关键词
氘代/铱配合物/磷光掺杂/OLED/功能材料Key words
deuteration/iridium complexes/phosphorescent doping/OLED/functional materials引用本文复制引用
基金项目
2020年房山区科技计划项目重大课题(20200102)
出版年
2024
NETL
NSTL
万方数据