摘要
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 series of water/alcohol soluble amino-functionalized carbazole-based copolymers were synthesized via Suzuki coupling reaction. The pendent amino groups endow them high solubility in polar solvents, as well as efficient electron injection capability from high work-function metals. The relationships between the photophysical and electrochemical properties and the polymer backbone structure were systematically investigated. These alcohol soluble carbazole-based copolymers were used as cathode interlayers between the high work-function metal A1 cathode and P-PPV emissive layer in polymer light-emitting diodes （PLEDs） with device structure of ITO/PEDOT： PSS/P-PPV/Interlayer/A1. The resulting devices exhibited improved performance due to the better electron injection/transporting ability of the designed copolymers from A1 cathode to the light-emitting layer.
出处
《中国科学：化学》
CAS
CSCD
北大核心
2013年第4期437-447,共11页
SCIENTIA SINICA Chimica
基金
国家自然科学基金(21125419
50990065
51073057)
国家重点基础研究发展计划(973计划
2009CB623601
2009CB930604)
国家高技术研究发展计划(863计划
2011AA03A110)
广东省自然科学基金(S2012030006230)的资助
关键词
聚合物发光二极管
胺基功能化共轭聚合物
电子注入
传输材料
界面材料
咔唑
polymer light-emitting diodes, amino-functionalized conjugated polymers, electron injection/transporting material, interface dipoles, carbazole
