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蓝光芴类聚合物存在的问题是光谱易发生红移,导致色纯度不好。针对聚芴类材料存在的问题,从聚合物分子结构上寻求有效抑制光谱红移的办法。采用Suzuki聚合法合成了一系列超支化蓝光聚芴。结果表明,随着支化度的增加,超支化结构对于抑制材料聚集的作用依次增强。所得的超支化聚合物在常用溶剂中有良好的溶解性。聚合物PFB25发光器件的EL光谱最大发射峰为419nm,最大外量子效率为2.1%。
Blu-ray fluorene polymers, the problem is that the spectrum is prone to red-shift, resulting in poor color purity. Aiming at the problems existing in polyfluorene-like materials, a method of effectively suppressing the red-shift of the spectrum is sought from the molecular structure of the polymer. A series of hyperbranched blue polyfluorenes were synthesized by Suzuki polymerization. The results showed that the hyperbranched structure enhanced the inhibitory effect on the aggregation of aggregates with the increase of the degree of branching. The resulting hyperbranched polymers have good solubility in common solvents. The maximum emission peak of EL spectrum of polymer PFB25 light-emitting device is 419nm, the maximum external quantum efficiency is 2.1%.