Development of a novel emitting vinyl polymer and its application in organic electroluminescent devices

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— A novel emitting vinyl polymer, poly[4-(7-{4-[N,N-bis(9,9-dimethylfluoren-2-yl)amino]phenyl}-2,1,3-benzothiadiazol-4-yl)phenylethylene] (PVFABT), was designed and synthesized. The new vinyl polymer was found to form smooth amorphous films with a high glass-transition temperature of 199°C. The polymer possesses bipolar character with both electron-donating and accepting properties. It undergoes reversible anodic oxidation and cathodic reduction to give stable cation and anion radicals. It exhibits intense orange fluorescence in solution and as film. A multilayer organic electroluminescent device using PVFABT as an emitting material emitted orange light, exhibiting high performance.

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