基于咪唑并[1,2-a]吡啶-三嗪的电子传输材料合成及性能  

Synthesis and Properties of Electron Transport Materials Based on Imidazo[1,2-a]pyridine-triazine

作　　者：程之樵 白科研 籍少敏[1] 戴雷 聂飞 霍延平[1] CHENG Zhi-qiao;BAI Ke-yan;JI Shao-min;DAI Lei;NIE Fei;HUO Yan-ping(School of Light Industry and Chemical Engineering, Guangdong University of Technology, Guangzhou 510006, China;Guangdong Aglaia Optoelectronic Materials Co., LTD, Foshan 528300, China)

机构地区：[1]广东工业大学轻工化工学院,广东广州510006 [2]阿格蕾雅光电材料有限公司,广东佛山528300

出　　处：《发光学报》2022年第5期702-713,共12页Chinese Journal of Luminescence

基　　金：国家自然科学基金(21975053,21975055,U2001222);广东省基础与应用基础研究基金(2019B1515120023)资助项目。

摘　　要：电子传输材料的开发对于降低有机电致发光器件(OLED)驱动电压至关重要,本文设计并合成了两种基于咪唑并[1,2-a]吡啶-三嗪类新型的电子传输材料,即2-(3′-(4-([1,1′-联苯基]-4-基)-6-苯基-1,3,5-三嗪-2-基)-5′-菲-9-基)-[1,1′-联苯基]-4-基)-3-苯基咪唑并[1,2-a]吡啶(TRZ-PA-Dp)和2-(5′′-(4-([1,1′-联苯基]-4-基)-6-苯基-1,3,5-三嗪-基)-[1,1′∶2′,1″∶3″,1-四联苯]-4-基)-3-苯基咪唑并[1,2-a]吡啶(TRZ-PP-Dp),并利用核磁和质谱对其结构进行表征。化合物TRZ-PA-Dp和TRZ-PP-Dp的单电子器件结果显示具有高电子迁移率,可以有效降低器件的驱动电压。因此以这两个材料作为电子传输材料,蓝色荧光器件启亮电压分别为3.2 V和3.1 V,相比使用常规电子传输材料TPBi的器件,启亮电压分别降低了0.1 V和0.2 V;同时绿色磷光器件启亮电压均为2.2 V,相比TPBi降低了0.2 V;红色磷光器件的启亮电压与TPBi的器件相近。基于这两个材料的器件都表现出良好的效率,特别是在激基复合物作为主体的绿色磷光器件中,与TPBi的器件相对比,在100 cd/m^(2)下电流效率(CE)和外量子效率(EQE)都提升了5%左右,功率效率(PE)提升了28%以上,寿命提高了4倍,证明TRZ-PA-Dp和TRZ-PP-Dp都为优异的电子传输材料。The development of electron transport materials is crucial for reducing the driving voltage of organic light emitting diodes(OLEDs).Two novel electron-transporting materials based on imidazo[1,2-a]pyridine-triazine were designed and synthesized,namely 2-(3′-(4-([1,1′-biphenyl]-4-yl)-6-phenyl-1,3,5-triazin-2-yl)-5′-phenanthrene-9-yl)-[1,1′-biph-enyl]-4-yl)-3-Phenyli midazo[1,2-a]pyridine(TRZ-PA-Dp)and 2-(5″-(4-([1,1′-biphenyl]-4-yl)-6-Phenyl-1,3,5-triazine-yl)-[1,1′∶2′,1″∶3″,1-tetraphenyl]-4-yl)-3-phenyli-midazo[1,2-a]pyridine(TRZ-PP-Dp),and their structures were characterized by NMR and mass spectrometry.The single-electron device results of compounds TRZ-PA-Dp and TRZ-PP-Dp show high electron mobility,which can effectively reduce the driving voltage of blue and green devices.Using these two materials as electron transport materials,the turn-on voltages of blue-light devices were 3.2 V and 3.1 V,compared with the devices using conventional electron transport material TPBi,the turn-on voltages were reduced by 0.1 V and 0.2 V,respectively.The turn-on voltages of green devices are both 2.2 V,which are 0.2 V lower than that of TPBi.The turn-on voltages of red devices are similar to that of TPBi device.Moreover,the devices based on the two materials in this paper show good efficiency,especially in the green phosphorescent device with the matrix complex as the host.Compared with the device of TPBi,the life time is increased by 4 times,and the current efficiency(CE)and external quantum efficiency(EQE)are increased by about 5%at 100 cd/m^(2).In particular,the power efficiency(PE)increased by more than 28%,proving that TRZ-PA-DP and TRZ-PP-DP are excellent electron transport materials.

关 键 词：咪唑并[1 2-a]吡啶 三嗪 电子传输材料 驱动电压 效率 

分 类 号：O482.31[理学—固体物理]