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

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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

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Publication details

The article was received on 25 Aug 2019, accepted on 30 Sep 2019 and first published on 01 Oct 2019


Article type: Research Article
DOI: 10.1039/C9QM00539K
Mater. Chem. Front., 2019, Advance Article

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    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, Advance Article , DOI: 10.1039/C9QM00539K

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