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Issue 25, 2016
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High-performance fluorescent/phosphorescent (F/P) hybrid white OLEDs consisting of a yellowish-green phosphorescent emitter

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Abstract

The color rendering index (CRI) of a white organic-light emitting device (WOLED) employing standard red + green + blue emitters is typically limited by the deep valley between the red and the green emission peaks. To address this issue without increasing device complexity, we synthesized a yellowish-green iridium emitter, iridium(III) bis(2-phenylpyridine)(2-(benzo[d]oxazol-2-yl)phenol) (Ir(ppy)2bop), for replacing the standard green emitter. By combining emissions from Ir(ppy)2bop with those from a blue fluorescent emitter and a red phosphor, a high performance fluorescent/phosphorescent (F/P) WOLED has been fabricated. The device gives white emission with a maximum efficiency of 55.2 cd A−1 (49.6 lm W−1) and an EQE value of 20% without any light extraction technologies. It is noteworthy that the color rendering index (CRI) of the white OLED reaches up to 89. Considering both the efficiency and the CRI, these results are among the best-reported white OLEDs.

Graphical abstract: High-performance fluorescent/phosphorescent (F/P) hybrid white OLEDs consisting of a yellowish-green phosphorescent emitter

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Publication details

The article was received on 08 Apr 2016, accepted on 09 May 2016 and first published on 10 May 2016


Article type: Paper
DOI: 10.1039/C6TC01421F
Citation: J. Mater. Chem. C, 2016,4, 5907-5913
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    High-performance fluorescent/phosphorescent (F/P) hybrid white OLEDs consisting of a yellowish-green phosphorescent emitter

    X. Du, J. Zhao, S. Yuan, C. Zheng, H. Lin, S. Tao and C. Lee, J. Mater. Chem. C, 2016, 4, 5907
    DOI: 10.1039/C6TC01421F

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