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Novel Approach for Alternating Current (AC)-Driven Organic Light-Emitting Devices

Authors

  • Ajay Perumal,

    Corresponding author
    1. Institut für Angewandte Photophysik (IAPP), Technische Universität Dresden (TUD), 01062 Dresden, Germany
    • Institut für Angewandte Photophysik (IAPP), Technische Universität Dresden (TUD), 01062 Dresden, Germany.

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  • Markus Fröbel,

    1. Institut für Angewandte Photophysik (IAPP), Technische Universität Dresden (TUD), 01062 Dresden, Germany
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  • Sandeep Gorantla,

    1. IFW Dresden, Institut für Komplexe Materialien, PO Box 270116, 01171 Dresden, Germany
    2. Institut für Werkstoffwissenschaft, Technische Universität Dresden (TUD), 01062 Dresden, Germany
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  • Thomas Gemming,

    1. IFW Dresden, Institut für Komplexe Materialien, PO Box 270116, 01171 Dresden, Germany
    2. Institut für Werkstoffwissenschaft, Technische Universität Dresden (TUD), 01062 Dresden, Germany
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  • Björn Lüssem,

    1. Institut für Angewandte Photophysik (IAPP), Technische Universität Dresden (TUD), 01062 Dresden, Germany
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  • Jürgen Eckert,

    1. IFW Dresden, Institut für Komplexe Materialien, PO Box 270116, 01171 Dresden, Germany
    2. Institut für Werkstoffwissenschaft, Technische Universität Dresden (TUD), 01062 Dresden, Germany
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  • Karl Leo

    Corresponding author
    1. Institut für Angewandte Photophysik (IAPP), Technische Universität Dresden (TUD), 01062 Dresden, Germany
    • Institut für Angewandte Photophysik (IAPP), Technische Universität Dresden (TUD), 01062 Dresden, Germany.

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Abstract

A novel approach for alternating current (AC)-driven organic light-emitting devices is reported, which uses the concept of molecular doping in organic semiconductors. Doped organic charge-transport layers are used to generate charge carriers within the device, hence eliminating the need for injecting charge carriers from external electrodes. Bright luminance of up to 1000 cd m−2 is observed when the device is driven with an AC bias. The luminance observed is attributed to charge-carrier generation and recombination, leading to the formation of excitons within the device, without injection of charge carriers through external electrodes. A mechanism for internal charge-carrier generation and the device operation is proposed.

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