中文摘要：

通过烷基将二（苯基异喹啉）（2-吡啶甲酸）合铱（Ⅲ）红色磷光基团、咔唑电子供体（D）单元和嗯二唑电子受体（A）单元同时引入到芴单元9-位的侧链上，设计合成了-类侧链含D-A和环金属铱配合物功能基的聚芴衍生物．通过改变封端剂的分子结构，研究了端基对这类聚芴衍生物光电性能的影响．与引入苯基为端基相比，引入螵二唑为端基能够有效抑制聚芴衍生物的excimer发射，提高这类材料在ITO／PEDOT／聚合物／LiF／AI器件中的发光效率，其中，端基为嚼二唑的聚芴衍生物（P1）器件的电流效率是端基为苯基的聚芴衍生物（P2）器件的1．42倍。达到了0．54ed／A．

英文摘要：

Two donor（D）-acceptor（A）-based polyfluorene derivatives （P1 and P2 ）, which contain carrier- transporting units of carbazole, oxadiazole and the red-emitting iridium bi（ phenyliso- quilonato） （picolinato） unit as the substitutes of the C-9 position of fuorene by unconjugated linkage were synthesized and charac- terized. Their opto-electronic properties were significantly influenced by the end-capping groups, the P~ end- capped with the oxadiazole unit exhibit significantly decreased excimer emission. In the polymer light-emit- ting devices with a configuration of ITO/PEDOT/polymers/LiF/A1, the P1 showed best electroluminescent properties than the Pz. The maximum current efficiency of 0.54 cd/A was obtained in the Pl-based device, which are 1.42 times higher than that in the P2-based device. Our work indicated that end-capping manners can improve EL properties of 2,7-polyfluorene derivatives.