Yonsei University, Department of Mechanical Engineering, Seoul, 120-749, Korea.
Sci Rep. 2017 Feb 17;7:43063. doi: 10.1038/srep43063.
An optically efficient structure was proposed and fabricated to realize high brightness organic light emitting diode (OLED) displays based on a white OLED prepared with the air-gapped bridges on the quantum dot (QD) patterns. Compared with a conventional white OLED display, in our experiments, the optical intensity of the proposed OLED display shows the enhancement of 58.2% in the red color and 16.8% in the green color after applying the air-gapped bridge structure on QD patterns of 20 wt% concentration. This enhancement comes from the two facts that the QD patterns downconvert unnecessary blue or blue/green light to the required green or red light and the air-gapped bridges increase the color conversion efficiency of QDs by optical recycling using total internal reflection (TIR) at the interface. In addition, the color gamut of the proposed OLED display increases from 65.5 to 75.9% (NTSC x, y ratio) due to the narrow emission spectra of QDs.
提出并制作了一种高效光学结构，以实现基于具有量子点（QD）图案气隙桥的白色有机发光二极管（OLED）的高亮度 OLED 显示器。与传统的白色 OLED 显示器相比，在我们的实验中，在 20wt%浓度的 QD 图案上应用气隙桥结构后，所提出的 OLED 显示器的红色光的光强度增强了 58.2%，绿光增强了 16.8%。这种增强来自两个事实，即 QD 图案将不必要的蓝色或蓝绿光下转换为所需的绿光或红光，并且气隙桥通过在界面处使用全内反射（TIR）来提高 QD 的颜色转换效率。此外，由于 QD 的窄发射光谱，所提出的 OLED 显示器的色域从 65.5 增加到 75.9%（NTSC x，y 比）。
