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首页> 外文期刊>Synthetic Metals >Application of alternating fluorene and thiophene copolymers in polymer light-emitting diodes
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Application of alternating fluorene and thiophene copolymers in polymer light-emitting diodes

机译：芴和噻吩交替共聚物在聚合物发光二极管中的应用

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Four polyfluorene copolymers comprised of fluorene and thiophene or bithiophene moieties were investigated and applied for device fabrication. Relatively high photoluminescence quantum yields (23-40 percent), good optical and electrochemical properties have been demonstrated for this series of polymers. Single and double layer devices fabricated with the polymers in a conventional configuration appeared to have electrons as the majority carrier, and their performance was remarkably improved when poly(3,4-ethylenedioxythiophene) (PEDOT) was selected as the hole-injection/transporting layer. The best performance was demonstrated for a double layer green-emitting device, which exhibited luminescence of 356 cd/m~2 at a bias of 8 V with an external efficiency of 0.38 percent. The current-voltage and luminescence characteristics of the devices with PEDOT or poly(N-vinylcarbazole) (PVK) as the buffer layer were studied and discussed.
机译：研究了由芴和噻吩或联噻吩部分组成的四种聚芴共聚物，并将其用于器件制造。已证明该系列聚合物具有较高的光致发光量子产率（23-40％），良好的光学和电化学性能。用常规结构的聚合物制成的单层和双层器件似乎以电子为主要载流子，当选择聚（3,4-乙撑二氧噻吩）（PEDOT）作为空穴注入/传输层时，其性能得到了显着改善。 。双层绿色发射器件表现出最佳性能，该器件在8 V偏压下的发光效率为356 cd / m〜2，外部效率为0.38％。研究并讨论了以PEDOT或聚（N-乙烯基咔唑）（PVK）为缓冲层的器件的电流-电压和发光特性。

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