中文摘要：

芴基电致蓝光材料低能绿光带（LEEB）的起源仍没有结论,其中芴酮诱导LEEB是重要机制之一,基于此我们提出通过引入含抗氧化的受阻胺来抑制LEEB的策略.通过复杂二芳基芴（CDAF）方式构建了一个共价键联接的含四甲基哌啶（TMP）的蓝光三聚芴有机半导体材料DF-PTMPF,并通过退火实验研究对其光谱稳定性的影响.研究结果表明DF-PTMPF的光谱稳定性有了很大提高,退火120h时的绿光指数φ为1.4（φ=IGreen/IBlue）,而相同条件下的三聚芴TDHF的绿光指数φ为2.4.同时,由于受阻胺可以除掉体系中微量的氧,而DF-PTMPF在起初的氮气气氛下退火24h仍产生绿光带,这一结果暗示了聚集诱导LEEB仍不能忽视.

英文摘要：

The origin of the low-energy emission band （LEEB） of fluorene-based blue electroluminescent materials has no identical conclusion. Based on keto-defect mechanism, a blending antioxidant strategy for stabilizing the organic semiconductors was previously proposed. In this communication, the antioxidant hindered amine was covalently incorporated into terfluorene to synthesize a complicated 9,9-diarylfluorene （CDAF）, DF-PTMPF, in order to prohibit the fluorenone-induced LEEB. DF-PTMPF with φ of 1.4 （φ= IGreen/IBlue） shows higher spectra stability than TDHF （φ= 2.4） after annealing for 120 h. However, DF-PTMPF initially exhibits LEEB after annealing for 24 h under N2 atmosphere, which indicates that aggregates and/or an excimer still play a crucial role in the origin of LEEB.