高等学校化学学报2024，Vol.45Issue(1)：45-54,10.DOI:10.7503/cjcu20230368
以二氢苊骨架构建的深蓝光有机电致发光材料
Deep Blue Organic Electroluminescent Materials Constructed from Acenaphthene Skeleton
摘要
Abstract
Four luminescent materials with carbazole or triphenylamine electron donor and cyanobenzene electron receptor linked on the acenaphthene skeleton were synthesized.The single crystal structures of those molecules show intramolecular steric hindrance,which makes the donor/acceptor non coplanar with the acenaphthene skeleton,reducing the degree of conjugation and eliminating the π-π stacking effect between molecules.Their crystals are stabilized by a large number of C—H…π intermolecular interactions,and only 3CzAB exists intramolecular π-π stacking.All four compounds have very high thermal stability,with 5％weight loss decompostion temperature(Td,5％)above 343℃.The luminescence of these materials in PMMA thin films is in the deep-blue emission region(403-432 nm),with high photoluminescence efficiency ranging from 0.60 to 0.94 and fluorescence lifetimes ranging from 5.4 to 8.6 ns.The electroluminescence property test shows that the device of PaAB has the best performance,the maximum brightness can reach 2427 cd/m2,the peak current efficiency,power efficiency and external quantum efficiency are 2.43 cd/A,1.53 lm/W and 1.58％respectively,and the Commission Internationale de l'Eclairage(CIEx,y)coordinates are(0.15,0.09),which are in the deep-blue light emission area.关键词
深蓝光分子/有机电致发光/二氢苊/荧光Key words
Deep-blue molecule/Organic light emitting diodes/Acenaphthene/Fluorescence分类
化学化工引用本文复制引用
王妍,张富俊,张校宇,徐佳惠,童碧海,陈平,孔辉..以二氢苊骨架构建的深蓝光有机电致发光材料[J].高等学校化学学报,2024,45(1):45-54,10.基金项目
国家自然科学基金(批准号:21572001,62205281)、安徽省专项支持计划项目(批准号:T000609)和皖江学者特聘教授项目资助.Supported by the National Natural Science Foundation of China(Nos.21572001,62205281),the Anhui Special Support Plan,China(No.T000609)and the Distinguished Professor of the Wanjiang Scholars Project,China. （批准号:21572001,62205281）
