Efficient green electroluminescent diodes based on poly (2-dimethyloctylsilyl-1,4-phenylenevinylene)

Authors

  • Sung Tae Kim,

    1. Cavendish Laboratory, Department of Physics Madingley Road, Cambridge CB2 OHE (UK)
    2. Department of Chemistry Korea Advanced Institute of Science and Technology Taejon, 305-701 (Korea)
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    • LG Electronics Research Center, 16 Woomyeon-dong, Seocho-gu, Seoul 137–140 (Korea)

  • Dr. Do-Hoon Hwang,

    1. University Chemical Laboratory, Department of Chemistry Lensfield Road, Cambridge CB2 1EW (UK)
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  • Dr. Xiao Chang Li,

    1. University Chemical Laboratory, Department of Chemistry Lensfield Road, Cambridge CB2 1EW (UK)
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  • Dr. Johannes Grüner,

    1. Cavendish Laboratory, Department of Physics Madingley Road, Cambridge CB2 OHE (UK)
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  • Prof. Richard H. Friend,

    Corresponding author
    1. Cavendish Laboratory, Department of Physics Madingley Road, Cambridge CB2 OHE (UK)
    • Cavendish Laboratory, Department of Physics Madingley Road, Cambridge CB2 OHE (UK)
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  • Dr. Andrew B. Holmes,

    1. University Chemical Laboratory, Department of Chemistry Lensfield Road, Cambridge CB2 1EW (UK)
    2. Melville Laboratory, Department of Chemistry Pembroke Street, Cambridge CBZ 3RA (UK)
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  • Dr. Hong Ku Shim

    1. Department of Chemistry Korea Advanced Institute of Science and Technology Taejon, 305-701 (Korea)
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  • The authors are grateful to D. S. Thomas, A. Koch, and M. G. Harrison for their valuable help with measurements and for useful discussions. We acknowledge support from the Engineering and Physical Sciences Research Council, and from the commission of the European Community, Esprit programme LEDFOS 8013. We also wish to thank J. W. Lee, J. S. Lee, H. J. Kwon and Y. W. Jung at the Analytical laboratory of LG-ERC for their surface and structural characterizations.

Abstract

An exceptionally high photoluminescene efficiency (60%) is reported for the title compound, a nwe, solution-processable derivative of PPV. It is shown that the compound can be used to make relatively efficient green electroluminescent diodes, and methods of further improving the efficiency of the device, e.g., incorporation of an electron-conducting, hole-blocking material, are described. Electroluminescence, photoluminescence, and UV-vis absorptioni spectra are presented, together with the I[BOND]V and light characteristics of the devices.

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