摘要
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%。
As blue emitting materials,one of the major problems for blue polyfluorenes-red-hifted EL emission,which leads to undesired color purity and color stability.A series of hyperbranched polyfluorenes were synthesized via Suzuki polycondensation.The results showed that the red shifted emission in the polyfluorene could be inhibited effectively with increasing of branched degree.All the copolymers have good solubility in common solvents.The maximum external quantum efficiency of 2.1% was achieved for polymer PFB25 with 419 nm maximum emission of the EL spectrum.
出处
《化工新型材料》
CAS
CSCD
北大核心
2007年第8期28-30,33,共4页
New Chemical Materials
基金
国家自然科学基金(No.20574021)
