Fluorene-containing polyhedral oligomericsilsesquioxanes modified hyperbranched polymer for white light-emitting diodes with ultra-high color rendering index of 96
作者:Mixue Wang、Xiaozhen Wei、Weixuan Zhang、Haocheng Zhao、Yuling Wu、Yanqin Miao、Hua Wang、Bingshe Xu
DOI:10.1016/j.jssc.2021.122122
日期:2021.6
fabricated devices with the hyperbranched polymers as light-emitting layers realized white light-emission, and the optimized device exhibite good electroluminescent (EL) performance with Commission Internationale de l’Eclairage (CIE) coordinates at (0.32, 0.33) and maximum color rendering index (CRI) of 96. The fluorene-containing POSSs modified hyperbranched copolymers with broad full width at half
本文以聚芴(PF)为支链,三维结构螺[3.3]庚烷-2,6-二螺芴(SDF)为共轭支化点,合成了一系列超支化发白共轭聚合物。锅铃木缩聚反应,其中将4,7-二噻吩基-2,1,3-苯并噻二唑(DBT)作为橙色发光单元,将含芴的多面体低聚倍半硅氧烷(POSSs)引入到骨架中,获得白色发光。通过调节含芴的POSS的进料比例(从1到20摩尔%),探索了POSS对超支化发白聚合物的影响机理。结果表明,合成的聚合物仍保持较高的热稳定性,并表现出改善的非晶膜形态和疏水性,有利于获得水空穴传输层中的聚(3,4-乙撑二氧噻吩)-聚(苯乙烯磺酸盐)(PEDOT:PSS)层与器件中的聚合物发光层之间的最佳界面制造。结果,所有以超支化聚合物作为发光层的预制器件均实现了白光发射,并且优化后的器件表现出良好的电致发光(EL)性能,国际照明委员会(CIE)坐标为(0.32, 0.33)和最大显色指数(CRI)为96.含芴