Chen Shuming, Kwok Hoi Sing
Center for Display Research, Department of Electronic & Computer Engineering, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong.
Opt Express. 2010 Jan 4;18(1):37-42. doi: 10.1364/OE.18.000037.
Light extraction from organic light-emitting diodes (OLEDs) by scattering the light is one of the effective methods for large-area lighting applications. In this paper, we present a very simple and cost-effective method to rough the substrates and hence to scatter the light. By simply sand-blasting the edges and back-side surface of the glass substrates, a 20% improvement of forward efficiency has been demonstrated. Moreover, due to scattering effect, a constant color over all viewing angles and uniform light pattern with Lambertian distribution has been obtained. This simple and cost-effective method may be suitable for mass production of large-area OLEDs for lighting applications.
通过散射光从有机发光二极管（OLED）中提取光，是用于大面积照明应用的有效方法之一。在本文中，我们提出了一种非常简单且经济高效的方法来使基板表面粗糙化，从而散射光。通过简单地对玻璃基板的边缘和背面进行喷砂处理，已证明正向效率提高了20%。此外，由于散射效应，在所有视角上都获得了恒定的颜色以及具有朗伯分布的均匀光图案。这种简单且经济高效的方法可能适用于用于照明应用的大面积OLED的大规模生产。
