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首页> 外文期刊>Organic Electronics >The interplay between the optical and electronic properties of light-emitting-diode applicable conjugated polymer blends and their phase-separated morphology
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The interplay between the optical and electronic properties of light-emitting-diode applicable conjugated polymer blends and their phase-separated morphology

机译：适用于发光二极管的共轭聚合物共混物的光学和电子性质及其相分离形态之间的相互作用

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摘要

We have investigated a series of different blends of the device applicable conjugated polymers poly(9,9-dioctylfluorene) [178] and poly(9,9-dioctylfluorene-alt-benzothiadiazole) [F8BT]. Scanning force microscopy indicates that blend films of F8 and F8BT spin-cast from toluene have more coarsely structured phase-separated domains, whereas films cast from chloroform are much more finely structured. This conclusion is confirmed using photoluminescence (PL) measurements, where we show that the degree of energy transfer from F8 to F8BT can be used as a measure of de-mixing in the blend. We have investigated different F8:F8BT blend films as the active semiconductor in light emitting diodes (LEDs). We find that the electroluminescence (EL) efficiency of the LED is a strong function of the relative composition of the blend, with highest efficiency occurring in blends of 95:5 F8:F8BT. In this particular polymer system, the morphological structure of the blend appears less important in determining LED efficiency than does the blend composition. (c) 2005 Elsevier B.V. All rights reserved.
机译：我们研究了装置适用的共轭聚合物聚（9,9-二辛基芴）[178]和聚（9,9-二辛基芴-alt-苯并噻二唑）[F8BT]的一系列不同混合物。扫描力显微镜显示，由甲苯旋转浇铸的F8和F8BT的共混薄膜具有更粗糙的结构相分离域，而由氯仿浇铸的薄膜的结构更精细。使用光致发光（PL）测量可以证实这一结论，在该测量中，我们证明了从F8到F8BT的能量转移程度可以用作共混物中解混合的量度。我们已经研究了不同的F8：F8BT混合膜作为发光二极管（LED）中的有源半导体。我们发现，LED的电致发光（EL）效率是共混物相对组成的强大函数，在95：5 F8：F8BT的共混物中，效率最高。在这种特定的聚合物体系中，共混物的形态结构在确定LED效率方面似乎不如共混物组成重要。 （c）2005 Elsevier B.V.保留所有权利。

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