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中文摘要：
以2，7-二溴-9，9-双（N，N-二甲基丙胺基）芴与4，7-双（5-溴-2-噻吩）-2，1，3-萘并噻二唑为共聚单体，通过Suzuki偶合反应合成按不同比例共聚的一系列共轭聚合物，并对它们的电致发光性能进行了研究．结果表明，所有的聚合物均在高功函数金属铝作阴极的器件中具有较高的发光效率，最大电致发光外量子效率为1．3％，好于目前广泛应用的低功函数金属（如钡，钙等）作阴极的发光效率．
英文摘要：
A series of aminoalkyl-substituted polyfluorene copolymers with 4,7-dithien-2-yl-2,1,3- naphthothiadiazole（SNS） with different contents were synthesized by Suzuki coupling reaction. The polymers are soluble in organic solvent, such as chloroform, toluene. All the polymers emit red light （more than 700 nm） under UV excitation in the solid state. It was found that the PFN-SNS polymers show a good device performance when high work-function metals, such as Al, are used as the electron-injection cathode replacing conventional low work-function cathodes such as Ca and Ba. The maximum external quantum efficiency is more than 1.3% with Al as cathode.
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