Two host heterocyclic compounds 5-(dibenzo[b,d]furan-4-yl)-1-(4,6-diphenyl-1,3,5-triazin-2-yl)-1H-indole (FITRZ) and 5-(dibenzo[b,d]thiophen-4-yl)-1-(4,6-diphenyl-1,3,5-triazin-2-yl)-1H-indole (TITRZ) were synthesized by CN coupling reaction of triazine and dibenzothiophene/dibenzofuran moiety with a 1,5-bridged indole unit. Their photo-physical, thermal and electrochemical properties were fully explored, and the results indicate that both of them are promising phosphorescent host materials for green and red PhOLED devices with low on-set potentials. For example, the green PHOLED based on TITRZ showed the maximum current and external quantum efficiency up to 85.9 cd/A and 23.7%. Meanwhile, the red PhOLED based on FITRZ yielded the maximum current and external quantum efficiency of 41.3 cd/A and 18.8% with a turn-on voltage of 3.0 V.

两个主体杂环化合物5-（二苯并[b，d]呋喃-4-基）-1-（4,6-二苯基-1,3,5-三嗪-2-基）-1H-吲哚（FITRZ）和5通过C N偶联反应合成了-（二苯并[b，d]噻吩-4-基）-1-（4,6-二苯基-1,3,5-三嗪-2-基）-1H-吲哚（TITRZ）三嗪和二苯并噻吩/二苯并呋喃部分具有1，5-桥联的吲哚单元。对它们的光物理，热和电化学性质进行了充分的研究，结果表明它们都是用于绿色和红色PhOLED器件且具有低启动电位的有希望的磷光主体材料。例如，基于TITRZ的绿色PHOLED的最大电流和外部量子效率高达85.9 cd / A和23.7％。同时，基于FITRZ的红色PhOLED 在3.0 V的开启电压下产生的最大电流和外部量子效率为41.3 cd / A和18.8％。