液晶与显示2022，Vol.37Issue(9)：1111-1121,11.DOI:10.37188/CJLCD.2022-0142
基于新型三取代苯衍生物的双极性主体材料及其高效蓝色电致磷光
New trisubstituted benzene derivatives bipolar host material for efficient blue electrophosphorescence
摘要
Abstract
High-performance blue phosphorescent host materials are one of the important factors for realizing high-efficiency electroluminescent devices. A pair of trisubstituted benzene isomers(material 1 and 2)as new bipolar host material with tunable triplet energy levels are well designed and prepared by incorporating carbazole and dibenzo[b,d]furan as the hole transport moieties and cyanophenyl as the electron transport moiety. Material 1 and 2 show intense violet fluorescence in the non-polar or less polar solvents. The introduction of cyano unit into the different position on phenyl moiety could effectively tune the triplet energy level(T1)of the bipolar host materials,especially for material 1 with much higher T1, which is suitable for efficient blue phosphorescent organic light-emitting diodes(OLEDs). Moreover,the trisubstitution molecular design strategy also provides the bipolar host materials with the steric hindrance in favor of OLEDs. The peak current efficiency,power efficiency,and external quantum efficiency of the blue phosphorescent OLED using materiat 1 as host reach 31. 53 cd/A,26. 93 lm/W,and 16. 17％, respectively. The preliminary results suggest that the trisubstitution molecular design strategy has great potential in designing new host materials for high-performance blue electroluminescence in the future.关键词
双极性主体材料/蓝色电致发光/咔唑/二苯并[b,d]呋喃/有机发光二极管Key words
bipolar host materials/blue electroluminescence/carbazole/dibenzo[b,d]furan/OLEDs分类
信息技术与安全科学引用本文复制引用
屈文山,朱慧文,李伟,樊霞霞,魏斌,高志翔..基于新型三取代苯衍生物的双极性主体材料及其高效蓝色电致磷光[J].液晶与显示,2022,37(9):1111-1121,11.基金项目
山西省科技攻关项目(No.201703D121037-2) （No.201703D121037-2）
山西省高等学校科技成果转化培育项目(No.31)Supported by Shanxi Province Science and Technology Key Project(No.201703D121037-2) （No.31）
Shanxi Prov-ince Universities Science and Technology Achievements Trans-formation and Cultivation Project(No.31) （No.31）
