| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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High-Performance Hybrid White Organic Light-Emitting Diodes Utilizing a Mixed Interlayer as the Universal Carrier Switch |
| DING Lei**, LI Huai-Kun, ZHANG Mai-Li, CHENG Jun, ZHANG Fang-Hui |
College of Science, Shaanxi University of Science and Technology, Xi'an 710021
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| Cite this article: |
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DING Lei, LI Huai-Kun, ZHANG Mai-Li et al 2015 Chin. Phys. Lett. 32 107805 |
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Abstract A new interlayer is successfully used to be a universal carrier switch, developing high-performance hybrid white organic light-emitting diodes (WOLEDs). By dint of this interlayer, the two-color hybrid WOLED shows a maximum total current efficiency (CE) and power efficiency (PE) of 48.1 cd/A and 37.6 lm/W, respectively, while the three-color hybrid WOLED shows a maximum total CE and PE of 33.8 cd/A and 25.7 lm/W, respectively. The color rendering index of the three-color hybrid WOLEDs are ≥75, which is already a sufficient level for many commercial lighting applications. In addition, both the two-color and three-color hybrid WOLEDs show low efficiency roll-off and stable color. Furthermore, devices with the new interlayer show much higher performance than devices with the most commonly used 4,4-N,N-dicarbazolebiphenyl and N,N'-di(naphthalene-1-yl)-N,N'-diphenyl-benzidine interlayers.
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Received: 28 July 2015
Published: 30 October 2015
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| PACS: |
78.60.Fi
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(Electroluminescence)
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72.80.Le
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(Polymers; organic compounds (including organic semiconductors))
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85.60.Jb
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(Light-emitting devices)
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