Cho Doo-Hee, Shin Jin-Wook, Joo Chul Woong, Lee Jonghee, Park Seung Koo, Moon Jaehyun, Cho Nam Sung, Chu Hye Yong, Lee Jeong-Ik
Opt Express. 2014 Oct 20;22 Suppl 6:A1507-18. doi: 10.1364/OE.22.0A1507.
We examined the light diffusing effects of nano and micro-structures on microcavity designed OLEDs. The results of FDTD simulations and experiments showed that the pillar shaped nano-structure was more effective than the concave micro-structure for light diffusing of microcavity OLEDs. The sharp luminance distribution of the microcavity OLED was changed to near Lambertian luminance distribution by the nano-structure, and light diffusing effects increased with the height of the nano-structure. Furthermore, the nano-structure has advantages including light extraction of the substrate mode, reproducibility of manufacturing process, and minimizing pixel blur problems in an OLED display panel. The nano-structure is a promising candidate for a light diffuser, resolving the viewing angle problems in microcavity OLEDs.
我们研究了纳米和微米结构对微腔设计有机发光二极管（OLED）的光扩散效果。时域有限差分（FDTD）模拟和实验结果表明，对于微腔OLED的光扩散，柱状纳米结构比凹形微米结构更有效。纳米结构将微腔OLED的尖锐亮度分布改变为接近朗伯亮度分布，并且光扩散效果随着纳米结构高度的增加而增强。此外，纳米结构具有包括衬底模式光提取、制造工艺的可重复性以及最小化OLED显示面板中的像素模糊问题等优点。纳米结构是一种很有前景的光扩散器候选材料，可解决微腔OLED中的视角问题。
