Advanced Materials

Nearly 100% Internal Quantum Efficiency in an Organic Blue-Light Electrophosphorescent Device Using a Weak Electron Transporting Material with a Wide Energy Gap

Authors

  • Lixin Xiao,

    Corresponding author
    1. State Key Laboratory for Mesoscopic Physics and Department of Physics Peking University, Beijing 100871 (P. R. China)
    2. Optoelectronic Industry and Technology Development Association (OITDA) 1-20-10 Sekiguchi, Bunkyo-ku Tokyo 112-0014 (Japan)
    • State Key Laboratory for Mesoscopic Physics and Department of Physics Peking University, Beijing 100871 (P. R. China).
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  • Shi-Jian Su,

    1. Optoelectronic Industry and Technology Development Association (OITDA) 1-20-10 Sekiguchi, Bunkyo-ku Tokyo 112-0014 (Japan)
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  • Yuya Agata,

    1. Optoelectronic Industry and Technology Development Association (OITDA) 1-20-10 Sekiguchi, Bunkyo-ku Tokyo 112-0014 (Japan)
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  • Hsinglin Lan,

    1. Department of Polymer Science and Engineering Yamagata University, 4-3-16 Jonan, Yonezawa Yamagata 992-8510 (Japan)
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  • Junji Kido

    Corresponding author
    1. Optoelectronic Industry and Technology Development Association (OITDA) 1-20-10 Sekiguchi, Bunkyo-ku Tokyo 112-0014 (Japan)
    2. Department of Polymer Science and Engineering Yamagata University, 4-3-16 Jonan, Yonezawa Yamagata 992-8510 (Japan)
    • Department of Polymer Science and Engineering Yamagata University, 4-3-16 Jonan, Yonezawa Yamagata 992-8510 (Japan).
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Abstract

A blue-light electrophosphorescence with an internal quantum efficiency of nearly 100%, much higher than that of a stronger electron transporting (ET) material, was achieved with a weak ET silane. This result contradicts the conventional notion that weak ET materials result in low efficiency.

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