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Enhanced organic light-emitting diode based on a columnar liquid crystal by integration in a microresonator

Authors

  • Olga Kasdorf,

    1. Center for Optoelectronics and Photonics Paderborn, University of Paderborn, Paderborn, Germany
    2. Department of Chemistry, Faculty of Science, University of Paderborn, Paderborn, Germany
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  • Joachim Vollbrecht,

    1. Center for Optoelectronics and Photonics Paderborn, University of Paderborn, Paderborn, Germany
    2. Department of Chemistry, Faculty of Science, University of Paderborn, Paderborn, Germany
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  • Benjamin Ohms,

    1. Center for Optoelectronics and Photonics Paderborn, University of Paderborn, Paderborn, Germany
    2. Institute of Electrical Engineering, Faculty of Electrical Engineering, Computer Science and Mathematics, University of Paderborn, Paderborn, Germany
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  • Ulrich Hilleringmann,

    1. Center for Optoelectronics and Photonics Paderborn, University of Paderborn, Paderborn, Germany
    2. Institute of Electrical Engineering, Faculty of Electrical Engineering, Computer Science and Mathematics, University of Paderborn, Paderborn, Germany
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  • Harald Bock,

    1. Centre de Recherce Paul Pascal, Université de Bordeaux, Bordeaux, France
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  • Heinz-S. Kitzerow

    Corresponding author
    1. Center for Optoelectronics and Photonics Paderborn, University of Paderborn, Paderborn, Germany
    2. Department of Chemistry, Faculty of Science, University of Paderborn, Paderborn, Germany
    • Correspondence: Heinz Kitzerow, Faculty of Science, University of Paderborn, Warburger Str. 100, 33098 Paderborn, Germany.

      E-mail: Heinz.Kitzerow@upb.de

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SUMMARY

A study of resonant cavity-enhanced light-emitting diodes based on a columnar liquid crystal was presented in this article. An organic layer made of the electroluminescent liquid crystal was sandwiched between a Bragg mirror deposited on a silicon substrate and a semitransparent top electrode. The fabrication of the substrates was complementary metal oxide semiconductor compatible, the maximum electroluminescence intensity was enhanced by a factor of 3–4, and the spectral width of the emission could be reduced down to 18 nm, thereby improving the chromaticity coordinates, considerably. Copyright © 2013 John Wiley & Sons, Ltd.

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