有机电致发光器件（Organic Light Emitting Devices, OLEDs）因其成本低、质量轻、可实现柔性等优点获得了广泛研究。顶发射OLEDs（Top-emitting OLEDs, TOLEDs）具有高色纯度及大开口率的优点，成为了OLEDs研究的主流。微腔型TOLEDs内在的微腔共振模式有益于提高器件的外量子效率，但同时带来光谱角度依赖和带宽窄化问题，是TOLEDs应用于显示和照明的主要障碍。传统的解决方案例如引入盖层和超薄电极等都是基于削弱微腔效应，牺牲了微腔效应增强外量子效率的作用。本项目聚焦这一问题，提出在器件电极上集成电磁超表面结构，利用其对光反射相位的调谐性来调控微腔共振模式的角度色散和带宽特性，在保留微腔模式强度即保证器件高效率的前提下，消除单色和白光TOLEDs的光谱角度依赖，并拓宽白光TOLEDs的共振光谱，为推动TOLEDs的实际应用做出有益探索。

Organic light emitting devices (OLEDs) have attracted much attention due to their merits of low cost, light weight, and flexibility. Top-emitting OLEDs (TOLEDs) have become key interests due to their merits of high aperture ratio and high resolution. The intrinsic microcavity resonance can help increase the external quantum efficiency, but at the same time brings disadvantages of angular dispersions and narrowed resonant bandwidth, which limits the application of TOLEDs. To overcome these obstacles, some approaches have been proposed such as introducing capping layers or using ultra-thin electrodes. However, all these approaches were based on weakening the microcavity resonance, and its merit of enhancing the external quantum efficiency was sacrificed. This project focuses on solving the problem by introducing a metasurface structure on top of the electrodes. The angular dispersion and bandwidth characteristics of the microcavity resonance can be tuned by manipulating the reflection phase of light on the metasurface. We aim to eliminate the angular dispersions in monochromatic and white TOLEDs and extend the spectral bandwidth in white TOLEDs while keep the intensity of the microcavity resonance for high device efficiency, which will contribute to large-scale manufacturing applications of OLEDs.