作者:Daniel Wagner、Sebastian T. Hoffmann、Ute Heinemeyer、Ingo Münster、Anna Köhler、Peter Strohriegl
DOI:10.1021/cm4023216
日期:2013.9.24
Two novel bipolar host materials BPTRZ and MBPTRZ were synthesized, in which the hole transporting carbazole is separated from the electron transporting triazine moiety by a fully aromatic, but nonconjugated meta-linked biphenyl unit. The additional twist at the biphenyl in MBPTRZ, which is achieved by methyl-substitution in 2- and 2′-position of the biphenyl leads to a higher triplet energy of 2.81
合成了两种新型的双极主体材料BPTRZ和MBPTRZ,其中空穴传输咔唑通过完全芳族但非共轭的间位联苯单元与电子传输三嗪部分隔开。MBPTRZ中联苯的额外扭曲是通过联苯的2和2'位上的甲基取代实现的,与BPTRZ的2.70 eV相比,三联态能量更高,为2.81 eV。两种材料都具有很高的热稳定性和良好的玻璃成型性能。以MBPTRZ为主体的蓝色磷光发光体FIrpic的有机发光二极管的最大亮度为30600 cd / m 2,最大外部量子效率为7.0%。