High Efficiency and Low Roll-Off Hybrid WOLEDs by Using a Deep Blue Aggregation-Induced Emission Material Simultaneously as Blue Emitter and Phosphor Host

摘要

OLEDs with high efficiency and low roll-off are urgently needed to meet the constantly increasing commercial demands for white organic light-emitting diodes (WOLEDs) in lighting industry applications. To enhance efficiency and decrease WOLED roll-off, complicated doping technologies are employed, which result in an additional increase in costs. Herein, a deep-blue-light molecule (3TPA-CN) with aggregation-induced emission (AIE) is introduced as blue emitter and phosphor host to fabricate WOLEDs. By optimizing the emission zones, high efficiency and low roll-off hybrid WOLEDs are achieved. The maximum forward-viewing power and external quantum efficiencies reach 86.7 lm W-1 and 22.3%, and remain 59.2 lm W-1 and 19.6% at a luminance of 1000 cd m(-2), fully exhibiting the prospect of AIE molecules as a promising electroluminescence material for the fabrication of high-performance WOLEDs.