Design and Performance Study of High Efficiency/Low Efficiency Roll-off/High CRI Hybrid WOLEDs Based on Aggregation-Induced Emission Materials as Fluorescent Emitters

Generally, hybrid white organic light-emitting diodes (WOLEDs) are constructed with blue fluorophor and yellow or green/red phosphors, and the used fluorophor and phosphors have to be doped in proper hosts to avoid the exciton quenching caused by molecular aggregation, which brings difficulties to device structure design and fabrication process. In this paper, we fabricated high efficiency/low efficiency roll-off/high CRI hybrid WOLEDs based on aggregation-induced emission (AIE) luminogens (AIEgens) with non-doping feature as fluorophor emitters. The resulting WOLEDs were constructed by two AIEgens that emit blue and green light, respectively, and a doped red phosphor, greatly simplifying the device structure. Encouragingly, the hybrid WOLEDs simultaneously achieved high efficiency (PEmax = 50.5 lm W-1, EQEmax = 20.5%), low efficiency roll-off (PE1000nit = 32.9 lm W-1, EQE1000nit = 18.9%), and high CRI (≥ 90). Our results indicate that AIEgens are promising material systems to manufacture high performance white OLEDs with simple device structure.