Optical Outcoupling Enhancement in Organic Light-Emitting Diodes: Highly Conductive Polymer as a Low-Index Layer on Microstructured ITO Electrodes

Authors

  • Tae-Wook Koh,

    1. Department of Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon, 305-701 (Rep. of Korea)
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  • Jung-Min Choi,

    1. Department of Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon, 305-701 (Rep. of Korea)
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  • Sunghun Lee,

    1. Samsung Mobile Display Co., LTD. Yongin, Gyunggi-Do, 446-711 (Rep. of Korea)
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  • Seunghyup Yoo

    Corresponding author
    1. Department of Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon, 305-701 (Rep. of Korea)
    • Department of Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon, 305-701 (Rep. of Korea).
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Abstract

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A highly conductive polymer layer coated on a microstructured indium tin oxide (ITO) electrode is proposed as a simple way to enhance outcoupling in organic light-emitting diodes. The relatively low refractive index of the conductive polymer provides an index contrast between the organic and ITO layers so that structuring of ITO electrodes can result in a significant optical effect.

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