Although both high-index substrates and horizontal-dipole emitters have been shown to be facile approaches for enhancing OLED (organic light emitting diode) light extraction, the full benefits and potential of their combination for OLED optical out-coupling have not been thoroughly studied and explored. Simulation studies indicate that very high optical coupling efficiency into substrates ϕ_sub (and perhaps similarly high OLED external quantum efficiencies) of ~90% can be possibly obtained with both high-index substrates (refractive index >1.8–1.9) and highly horizontal-dipole emitters (horizontal dipole ratio >85%), together with adoption of low-index or index-matching carrier transport layers and optimization of organic layer and transparent electrode thicknesses. With these judicious device design conditions, all waveguided modes and surface plasmon modes in devices can be effectively suppressed for optimal optical out-coupling. Finally, combining the sapphire substrate having high index of n~1.78, the recently developed OLED emitters having high horizontal emitting dipole ratio of up to 87%, and simple external extraction lens, OLED devices having external quantum efficiency of over 80% was successfully realized.

尽管高折射率基板和水平偶极子发射器均已显示出是增强OLED（有机发光二极管）光提取的简便方法，但尚未充分研究其组合用于OLED光学输出耦合的全部好处和潜力。探索。模拟研究表明，非常高的光耦合效率为基板φ_子高折射率基板（折射率> 1.8-1.9）和高水平偶极发射极（水平偶极子比例> 85％）都可以获得（大约类似的高OLED外部量子效率）约90％低折射率或折射率匹配的载流子传输层的设计以及有机层和透明电极厚度的优化。利用这些明智的器件设计条件，可以有效地抑制器件中的所有波导模式和表面等离子体激元模式，以实现最佳的光输出耦合。最后，组合具有高折射率的蓝宝石衬底N〜1.78，最新开发的具有高达87％的高水平发射偶极子比的OLED发射器，以及简单的外部提取透镜，实现了外部量子效率超过80％的OLED器件。