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首页> 外文期刊>Advanced Functional Materials >Tuning the Emitting Color of Organic Light-Emitting Diodes Through Photochemically Induced Transformations: Towards Single-Layer, Patterned, Full-Color Displays and White-Lighting Applications
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Tuning the Emitting Color of Organic Light-Emitting Diodes Through Photochemically Induced Transformations: Towards Single-Layer, Patterned, Full-Color Displays and White-Lighting Applications

机译：通过光化学诱导的转换来调节有机发光二极管的发光颜色：面向单层，图案化，全彩色显示器和白光照明应用

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摘要

Photochemically induced emission tuning for the definition of pixels emitting the three primary colors, red, green, blue (RGB), in a single conducting polymeric layer is investigated. The approach proposed is based on an acid-induced emission shift of the (1-[4-(dimethylamino)phenyl]-6-phenylhexatriene) (DMA-DPH) green emitter and acid-induced quenching of the red fluorescent emitter (4-dimethylamino-4'-nitrostilbene) (DANS). The two emitters are dispersed in the wide bandgap conducting polymer poly(9-vinylcarbazole) (PVK), along with a photoacid generator (PAG). In the unexposed film areas, red emission is observed because of efficient energy transfer from PVK and DMA-DPH to DANS. Exposure of selected areas of the film at different doses results in quenching of the red emitter's fluorescence and the formation of green, blue, or even other color-emitting pixels, depending on the exposure dose and the relative concentrations of the different compounds in the film. Organic light-emitting diodes having the PVK polymer containing the appropriate amounts of DMA-DPH, DANS, and PAG as the emitting layer are fabricated and electroluminescence spectra are recorded. The time stability of induced emission spectrum changes and the color stability during device operation are also examined, and the first encouraging results are obtained.
机译：研究了光化学诱导的发射调谐，以定义在单个导电聚合物层中发射红色，绿色，蓝色（RGB）三种原色的像素。提出的方法基于（1- [4-（二甲基氨基）苯基] -6-苯基己三烯）（DMA-DPH）绿色发射体的酸诱导发射位移和红色荧光发射体（4-二甲基氨基-4'-亚硝基二苯乙烯）（DANS）。这两个发射器与光生酸剂（PAG）一起分散在宽带隙导电聚合物聚（9-乙烯基咔唑）（PVK）中。在未曝光的胶片区域中，由于从PVK和DMA-DPH到DANS的有效能量转移，观察到红色发射。根据曝光剂量和胶片中不同化合物的相对浓度，以不同的剂量对胶片的选定区域进行曝光会导致红色发射器的荧光猝灭并形成绿色，蓝色甚至其他发色像素。 。制备具有PVK聚合物的有机发光二极管，该PVK聚合物含有适量的DMA-DPH，DANS和PAG作为发光层，并记录了电致发光光谱。还检查了诱导发射光谱变化的时间稳定性和器件工作期间的颜色稳定性，并获得了令人鼓舞的结果。

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