基于香豆素衍生物的新型绿色/红色磷光有机电致发光主体材料的设计、合成及性能表征

Design,Synthesis and Characterization of New Host Material Based on Coumarin Derivative for Green and Red Phosphorescent OLEDs

设计并合成了一种新型的香豆素衍生物,3,3-′(1,3-苯基)双(7-乙氧基-4-甲基香豆素)(mEMCB),并系统地对该香豆素衍生物进行了结构表征、光物理性能、热物理性能及电化学性能的研究.mEMCB具有较高的三重态能级(2.42eV),可敏化绿色、红色磷光掺杂材料.同时,mEMCB还具有较好的热稳定性(Tg:79.72℃,Td:361.49℃),其Tg明显高于目前广泛使用的磷光主体材料CBP.研究结果表明,mEMCB是一个潜在的可以用于绿色和红色磷光有机电致发光器件的主体材料.

A new coumarin derivative, 1, 3-bis （7-ethoxy-4-methyl-3-coumarinyl） benzene （mEMCB）, was designed and synthesized, mEMCB exhibits higher triplet energy （2. 42 eV） than that of the most green and red phosphorescent dopants. Furthermore, mEMCB has good thermal stabilities. The decomposition temperature （Td） is 361.49 ℃, and the glass transition temperature （Tg） is 79. 72 ℃, which is obviously higher than that of popular host material CBP （Tg, 62 ℃）. The results indicate that mEMCB is a potential host material for green and red phosphorescent OLEDs.