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发展了新型含有胺基的支化烷基修饰的咔唑单元,并且与芴、咔唑、苯等单元通过Suzuki偶联反应共聚得到不同主链结构的水/醇溶共轭聚合物界面修饰材料,研究了主链结构的变化对材料光物理、电化学性能的影响.所有聚合物均被用作阴极界面材料应用于器件结构为ITO/PEDOT:PSS/P-PPV/界面层/Al的聚合物发光二极管中.在相同器件制备条件下,系统比较了不同主链结构的界面修饰材料在器件中的性能,并研究了性能差异的原因.器件研究结果表明,在高功函数金属Al阴极的聚合物发光二极管中,含胺基功能化咔唑单元的水/醇溶共轭聚合物材料由于界面偶极的形成,均表现出很好的电子注入/传输性能,与之对应的器件性能得到大幅提升.
A new branched alkyl-modified carbazole unit with amine group was developed, and copolymerization with fluorene, carbazole, benzene and other units by Suzuki coupling reaction to obtain water / alcohol conjugated polymer interfacial modification material with different main chain structure , The effects of the changes of the main chain structure on the photophysical and electrochemical properties of the materials were studied.All the polymers were used as the cathode interface material in the ITO / PEDOT: PSS / P-PPV / interfacial layer / Al polymerization In the light-emitting diode (LED), the performance of interfacial interfacial materials with different main chain structures in the device was compared and the reasons for the difference in performance were also studied.The device results show that in the high-work-function metal Al cathode In polymer light-emitting diodes, water / alcohol conjugated polymer materials containing amine-functionalized carbazole units exhibit good electron injection / transport properties due to the formation of interface dipoles, and the corresponding device performance is obtained Dramatically improved.