60.1: Invited Paper: Tandem Hybrid White OLED Devices with Improved Light Extraction

A high-efficacy white OLED device is reported. At 1,000 cd/m2, the device showed an efficacy of 56 lm/W. The color at (0.387, 0.389) was within the Energy Star tolerance quadrangle; the CRI at 83.6 exceeded the requirements. The device had a tandem hybrid architecture comprising a fluorescent blue-emitting unit and a phosphorescent yellow-red-emitting unit. It also had an internal extraction enhancement structure that greatly enhanced the light extraction efficiency.