High‐Performance Hybrid White Organic Light‐Emitting Devices without Interlayer between Fluorescent and Phosphorescent Emissive Regions

Abstract

By using mixed hosts with bipolar transport properties for blue emissive layers, a novel phosphorescence/fluorescence hybrid white OLED without using an interlayer between the fluorescent and phosphorescent regions is demonstrated. The peak EQE of the device is 19.0% and remains as high as 17.0% at the practical brightness of 1000 cd m−2.