The solid‐state lighting sources require high efficiency and high‐quality illumination at the same time. Here, highly efficient white organic light emitting diodes (WOLEDs) comparable to LEDs are demonstrated using a random vacuum nanohole array and a half‐spherical lens as internal and external light extraction layers, respectively, exhibiting the maximum external quantum efficiency of 78% and luminous efficacy of 164 lm W⁻¹. These high efficiencies are achieved by extracting all the waveguided and substrate‐confined modes, minimizing surface plasmon polariton loss by elongating the distance from emitting dipole to reflective electrode and selection of phosphorescent dyes having high horizontal emitting dipole ratios. In addition, the WOLEDs satisfy the requirements as a high‐quality lighting source with a high color temperature of 3400 K, the color rendering index of 80, uniform emission pattern, and little variation of color with viewing angle. It is supposed that the present research reaches the ultimate goal of light extraction technology for practical applications.

中文翻译：

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具有与LED相当的效率的高质量白色OLED

固态光源同时需要高效和高质量的照明。在这里，使用随机真空纳米孔阵列和半球形透镜分别作为内部和外部光提取层，展示了与LED相当的高效白色有机发光二极管（WOLED），其最大外部量子效率为78％，并且发光164 lm W ^-1的功效。这些高效率是通过提取所有的波导模式和受衬底限制的模式，通过延长从发射偶极到反射电极的距离以及选择具有高水平发射偶极比的磷光染料来最小化表面等离子激元损耗的方法来实现的。此外，WOLED满足了以下要求：高质量的光源，具有3400 K的高色温，80的显色指数，均匀的发射图案以及随视角变化的颜色很少。可以认为，本研究达到了实际应用中光提取技术的最终目的。