Metallic nano-structures in micro-cavity organic light emitting diode (OLED) can significantly enhance light out-coupling efficiency. Nevertheless, they are not widely accepted in conventional devices due to its complicated process and increased manufacturing cost. In this study, we demonstrate a production-ready alternative for increasing the efficiency of OLEDs by implementing thermal-assisted self-aggregated metallic nanoparticles (NPs). Silver NPs are fabricated by thermal annealing of vacuum deposited thin silver layer without any complicated process, which is easily scalable in large area with low cost. Theoretical calculation and dark field microscopy image indicate that these stochastic Ag NPs provide light scattering in broad range. By incorporating Ag NPs to OLED with micro-cavity structure, 11% improvement in the external quantum efficiency was obtained without deteriorating viewing angle.

微腔有机发光二极管（OLED）中的金属纳米结构可以显着提高光输出耦合效率。然而，由于其复杂的工艺和增加的制造成本，它们并未在常规装置中被广泛接受。在这项研究中，我们展示了一种生产就绪的替代方案，可通过实施热辅助自聚集金属纳米颗粒（NP）来提高OLED的效率。通过对真空沉积的薄银层进行热退火而无需任何复杂的工艺即可制备出银纳米颗粒，这很容易在大面积上以低成本进行扩展。理论计算和暗场显微镜图像表明，这些随机的银纳米粒子提供了广泛的光散射。通过将Ag NP掺入具有微腔结构的OLED中，