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Highly Efficient White Organic Light-Emitting Diodes with Controllable Excitons Behavior by a Mixed Interlayer between Fluorescence Blue and Phosphorescence Yellow-Emitting Layers

机译:高效的白色有机发光二极管,具有可控激子行为的混合中间层在荧光蓝和磷光黄色发光层之间

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摘要

A highly efficient hybrid white organic light-emitting diode (HWOLED) has been demonstrated with a mixed interlayer between fluorescent blue and phosphorescent yellow-emitting layers. The device structure is simplified by using a controllable fluorescence-mixed interlayer-phosphorescence emission layer structure. The electroluminance (EL) performance can be modulated easily by adjusting the ratio of the hole-predominated material to the electron-predominated material in the interlayer. It is found that the HWOLED with a ratio of 3 : 2 exhibits a current efficiency of 34 cd/A and a power efficiency of 29 lm/W at 1000 cd/m2 with warm white Commission Internationale de l’Eclairage (CIE1931) coordinates of (0.4273, 0.4439). The improved efficiency and adaptive CIE coordinates are attributed to the controllable mixed interlayer with enhanced charge carrier transport, optimized excitons distribution, and improved harvestings of singlet and triplet excitons.
机译:已经在荧光蓝和磷光黄色发光层之间用混合中间层进行了高效的混合白色有机发光二极管(HWOLED)。通过使用可控的荧光混合层间磷光发光层结构简化了器件结构。通过将空穴主导材料与中间层中的电子优势材料的比率调节到夹层中的孔主导材料的比例,可以容易地调节电解(EL)性能。发现具有3:2的比例的HWOLED在1000℃/平方米的温暖白色DE L'EClAREGE(CIE1931)坐标中,具有3:2的比率为34d / a的电流效率为34d / a和29lm / w的功率效率。 (0.4273,0.4439)。改进的效率和自适应CIE坐标归因于可控制的混合中间层,具有增强的电荷载流子传输,优化的激子分布和单态和三重态激子的改善的收获。

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