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首页> 外文期刊>Advanced Materials >White Electroluminescence from a Single Polymer System: Improved Performance by Means of Enhanced Efficiency and Red-Shifted Luminescence of the Blue-Light-Emitting Species
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White Electroluminescence from a Single Polymer System: Improved Performance by Means of Enhanced Efficiency and Red-Shifted Luminescence of the Blue-Light-Emitting Species

机译：单一聚合物系统的白色电致发光：通过增强的效率和蓝光发射物种的红移发光来提高性能

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摘要

Recently, white polymer light-emitting diodes (WPLEDs) have received considerable attention because of their potential utilization in display and lighting applications via low-cost solution processing. One common approach to obtaining white emission from polymer LEDs is to use blends as emissive layers, such as polymer/polymer blends or polymer/ small-molecule blends. Although high electroluminescence (EL) efficiencies have been achieved, WPLEDs based on blend systems suffer from bias-dependent EL spectra and intrinsic phase separation during long-term device operation. Another approach to WPLEDs is the use of a single polymer as the emissive layer. Together, blue emission from the polymer itself and orange emission from an aggregate/exci-mer/exciplex give white emission. Although phase separation is completely prevented, WPLEDs based on this strategy suffer from low EL efficiencies.
机译：近来，白色聚合物发光二极管（WPLED）由于通过低成本溶液处理在显示和照明应用中的潜在利用而备受关注。从聚合物LED获得白光发射的一种常用方法是使用共混物作为发光层，例如聚合物/聚合物共混物或聚合物/小分子共混物。尽管已经实现了高电致发光（EL）效率，但基于共混体系的WPLED在长期的器件工作期间会受到偏压依赖的EL光谱和固有相分离的困扰。 WPLED的另一种方法是使用单一聚合物作为发光层。来自聚合物本身的蓝色发射和来自聚集体/准分子/复合物的橙色发射一起给出了白色发射。尽管完全防止了相分离，但是基于此策略的WPLED的EL效率较低。

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