Blue emitters are necessary for achieving full-color displaying OLEDs, however, most blue emitters show low efficiency, short lifetime or serious efficiency roll-off, hindering the development of OLED techniques. In this research, a nonpolar symmetric aggregation-induced emission (AIE) emitter was designed and constructed through facile steps, with the triphenylamine-end, anthracene-spacer and tetraphenylethene (TPE)-center. This emitter exhibited good thermal stability and aggregation-enhanced emission (AEE) characteristics, based on which non-doped blue OLED device was readily fabricated with the maximum external quantum efficiency (EQE) of 2.7% and also with no efficiency roll-off even at 1000 cd.m^-2, indicative of high efficiency and good stability as fluorescent emitter.

蓝色发光器是实现全色显示OLED所必需的，但是，大多数蓝色发光器显示出低效率，短寿命或严重的效率下降，这阻碍了OLED技术的发展。在这项研究中，通过以三苯胺端，蒽间隔基和四苯乙稀（TPE）为中心的简便步骤设计和构建了非极性对称聚集诱导发射（AIE）发射器。该发射极表现出良好的热稳定性和聚集增强发射（AEE）特性，基于此特性，不掺杂的蓝色OLED器件易于制造，最大外部量子效率（EQE）为2.7％，并且即使在50℃时也没有效率下降。 1000 cd.m ^-2，指示作为荧光发射体的高效率和良好的稳定性。