Shin Chur-Hyun, Shin Eul Yong, Kim Min-Hoi, Lee Jae-Hyun, Choi Yoonseuk
Opt Express. 2015 Feb 9;23(3):A133-9. doi: 10.1364/OE.23.00A133.
Nanoparticle scattering layer based on polymer-metal oxide composite is successfully introduced to enhance the light extraction efficiency of organic light emitting diodes (OLEDs). We find that the density and the distribution of nanoparticles is the key factor to maximize the light extraction efficiency of pristine OLEDs by out-coupling the unusable light with the scattering film. In our experiment, 71 wt% of Al(2)O(3) mixed with polymer matrix shows the increase of light extraction efficiency of 40%. This method is expected to play a critical role to create the low-power OLED application such as OLED lightings with simple fabrication process and low cost.
基于聚合物-金属氧化物复合材料的纳米颗粒散射层被成功引入，以提高有机发光二极管（OLED）的光提取效率。我们发现，纳米颗粒的密度和分布是通过散射膜将无法使用的光外耦合，从而使原始OLED的光提取效率最大化的关键因素。在我们的实验中，71 wt%的Al(2)O(3)与聚合物基质混合，光提取效率提高了40%。预计这种方法将在制造工艺简单且成本低廉的低功耗OLED应用（如OLED照明）中发挥关键作用。
