Advanced Materials

Two-Dimensional TiO2 Inverse Opal with a Closed Top Surface Structure for Enhanced Light Extraction from Polymer Light-Emitting Diodes

Authors

  • Woo Jin Hyun,

    1. Department of Chemical and Biomolecular Engineering, (BK21 Graduate Program), Korea Advanced Institute of Science and Technology, 335 Gwahangro, Yuseong-gu, Daejeon, 305–701, Republic of Korea
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  • Hang Ken Lee,

    1. Department of Chemical and Biomolecular Engineering, (BK21 Graduate Program), Korea Advanced Institute of Science and Technology, 335 Gwahangro, Yuseong-gu, Daejeon, 305–701, Republic of Korea
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  • Sang Soon Oh,

    1. Department of Physics, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
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  • Ortwin Hess,

    1. Department of Physics, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
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  • Choon-Gi Choi,

    1. Convergence and Components & Materials Research Laboratory, Electronics and Telecommunications Research Institute, 138 Gajeongro, Yuseong-gu, Daejeon, 305–700, Republic of Korea
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  • Sang Hyuk Im,

    1. KRICT-EPFL Global Research Laboratory, Advanced Materials Division, Korea Research Institute of Chemical Technology, 19 Sinseongno, Yuseong-gu, Daejeon, 305–600, Repubic of Korea
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  • O Ok Park

    Corresponding author
    1. Department of Chemical and Biomolecular Engineering, (BK21 Graduate Program), Korea Advanced Institute of Science and Technology, 335 Gwahangro, Yuseong-gu, Daejeon, 305–701, Republic of Korea
    • Department of Chemical and Biomolecular Engineering, (BK21 Graduate Program), Korea Advanced Institute of Science and Technology, 335 Gwahangro, Yuseong-gu, Daejeon, 305–701, Republic of Korea.
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Abstract

Two-dimensional TiO2 inverse opal structures with a thin, flat-top surface are fabricated and inserted between the glass substrate and the anode electrode of solution-processed polymer light-emitting diodes. It is demonstrated that the proposed inverse opal structure acts as a 2D photonic crystal, achieving a significant enhancement in the light extraction from the electroluminescent devices.

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