Issue 12, 2019

Design and performance study of high efficiency/low efficiency roll-off/high CRI hybrid WOLEDs based on aggregation-induced emission materials as fluorescent emitters

Abstract

Generally, hybrid white organic light-emitting diodes (WOLEDs) are constructed with blue fluorophores and yellow or green/red phosphors, and the fluorophores and phosphors used have to be doped into proper hosts to avoid the exciton quenching caused by molecular aggregation, which brings difficulties in device structure design and fabrication. 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 features as the fluorophore 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 for manufacturing high-performance white OLEDs with a simple device structure.

Graphical abstract: Design and performance study of high efficiency/low efficiency roll-off/high CRI hybrid WOLEDs based on aggregation-induced emission materials as fluorescent emitters

Supplementary files

Article information

Article type
Research Article
Submitted
25 avq 2019
Accepted
30 sen 2019
First published
01 okt 2019

Mater. Chem. Front., 2019,3, 2652-2658

Design and performance study of high efficiency/low efficiency roll-off/high CRI hybrid WOLEDs based on aggregation-induced emission materials as fluorescent emitters

Z. Xu, J. Gu, J. Huang, C. Lin, Y. Li, D. Yang, X. Qiao, A. Qin, Z. Zhao, B. Z. Tang and D. Ma, Mater. Chem. Front., 2019, 3, 2652 DOI: 10.1039/C9QM00539K

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