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Organic light-emitting diode with liquid emitting layer

Appl. Phys. Lett. 95, 053304 (2009); doi:10.1063/1.3200947

Published 6 August 2009

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Denghui Xu and Chihaya Adachi
Center for Future Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
We demonstrate an original organic light-emitting diode (OLED) having a neat liquid host of 9-(2-ethylhexyl)carbazole (EHCz) doped with a guest emitter of 5,6,11,12-tetraphenylnapthacene (rubrene). The device structure is composed of indium tin-oxide (ITO)/poly(3,4-ethylenedioxythiophene):poly(styrenesulphonate)/EHCz:rubrene/Cs2CO3/ITO. We demonstrate that the liquid organic semiconducting layer surely transports charge carriers, leading to electroluminescence from rubrene with the highest external quantum efficiency of etaext=0.03% at a current density of 0.26  mA/cm2. Our demonstration of the liquid-OLEDs will open another possibility of organic semiconductors and light-emitting applications. ©2009 American Institute of Physics
History: Received 11 May 2009; accepted 18 July 2009; published 6 August 2009
Permalink: http://link.aip.org/link/?APPLAB/95/053304/1
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KEYWORDS and PACS

Keywords
PACS
  • 85.60.Jb
    Light-emitting devices
  • 81.05.Hd
    Other semiconductors: fabrication, treatment, testing and analysis
  • 81.05.Lg
    Organic materials and polymers: fabrication, treatment, testing and analysis
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
AIP is a member of CrossRef AIP

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