Solution-Processed Small Molecular Organic Light-Emitting Devices with a Mixed Single Layer
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概要
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We investigated the characteristics of solution-processed mixed-single-layer organic light-emitting devices (OLEDs) by mixing an electron injection material, a hole transport material, and a dopant material based on 5,6,11,12-tetraphenylnaphthacene (rubrene). The mixed-single-layer OLEDs showed better performance by optimizing the solution concentration and mixing ratio of organic materials. The performance was further improved by mixing chloroform (95 wt %) and toluene (5 wt %) as a solvent. The maximum luminance and power efficiency obtained were 12,400 cd/m2 and 1.1 lm/W, respectively. The mixed-single-layer OLEDs by solution process can be expected as an alternative route to the fabrication of small-molecular OLEDs with reduced cost of devices and avoiding the complexities of the co-evaporation of multiple organic materials in the vacuum deposition process.
- 2011-01-25
著者
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Naka Shigeki
Graduate Scholl of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
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Okada Hiroyuki
Graduate Scholl of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
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Wang Zhaokui
Graduate School of Science and Technology, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
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