Methoxy- and tert-butyl-substituted meta-bis(N-carbazolyl)phenylenes as hosts for organic light-emitting diodes
作者:Jonas Keruckas、Dmytro Volyniuk、Jurate Simokaitiene、Edgaras Narbutaitis、Algirdas Lazauskas、Pei-Hsi Lee、Tien-Lung Chiu、Chi-Feng Lin、Pavel Arsenyan、Jiun-Haw Lee、Juozas V. Grazulevicius
DOI:10.1016/j.orgel.2019.06.026
日期:2019.10
Two new analogues of a popular host material, meta-bis(N-carbazolyl)phenylene (mCP), bearing either methoxy- (mCP-OMe) or tert-butyl (mCP-t-Bu) substituents at C-3 and C-6 positions of carbazole moieties were synthesized and characterized. These materials exhibit higher glass-transition temperatures (79 and 145 °C) than mCP (67 °C). They show reversibility upon electrochemical oxidation while preserving
流行的主体材料的两个新类似物,间-双(N-咔唑基)亚苯基(m CP),在C-3处带有甲氧基-(m CP-OMe)或叔丁基(m CP- t -Bu)取代基合成并表征了咔唑部分的C-6位和C-6位。这些材料的玻璃化转变温度(79和145°C)比m CP(67°C)高。它们在电化学氧化时显示出可逆性,同时保留了足够高的三重态能级(2.86和2.97 eV)。m CP- t -Bu的真空沉积层8×10的显示的空穴迁移率-3厘米2 V -1小号-1 在1.2×10的电场5 VCM -1。该值比m CP高一个数量级。测试了这些新化合物作为商业发射体的宿主:蓝色磷光体,双[2-(4,6-二氟苯基)吡啶基-C 2,N ](吡啶并吡啶)铱(III)(FIrpic),绿色和蓝色热活化延迟荧光(TADF)发射体1,2,3,5-四(9-咔唑基)-4,6-二氰基苯(4CzIPN)和双[4-(9,9-二甲基-9,10