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Advanced Materials

New Host Containing Bipolar Carrier Transport Moiety for High-Efficiency Electrophosphorescence at Low Voltages

Authors

  • Zhi Qiang Gao,

    Corresponding author
    1. Centre for Advanced Luminescence Materials Hong Kong Baptist University Hong Kong, SAR (PR China)
    2. Present address: Institute of Advanced Materials Nanjing University of Posts and Telecommunications Nanjing (PR China)
    • Centre for Advanced Luminescence Materials Hong Kong Baptist University Hong Kong, SAR (PR China).
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  • Meiming Luo,

    1. Centre for Advanced Luminescence Materials and Department of Chemistry Hong Kong Baptist University Hong Kong SAR (PR China)
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  • Xiao Hua Sun,

    1. Centre for Advanced Luminescence Materials and Department of Chemistry Hong Kong Baptist University Hong Kong SAR (PR China)
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  • Hoi Lam Tam,

    1. Centre for Advanced Luminescence Materials and Department of Physics Hong Kong Baptist University Hong Kong SAR (PR China)
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  • Man Shing Wong,

    Corresponding author
    1. Centre for Advanced Luminescence Materials and Department of Chemistry Hong Kong Baptist University Hong Kong SAR (PR China)
    • Centre for Advanced Luminescence Materials and Department of Chemistry Hong Kong Baptist University Hong Kong SAR (PR China).
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  • Bao Xiu Mi,

    1. Institute of Advanced Materials Nanjing University of Posts and Telecommunications Nanjing (PR China)
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  • Ping Fang Xia,

    1. Centre for Advanced Luminescence Materials and Department of Chemistry Hong Kong Baptist University Hong Kong SAR (PR China)
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  • Kok Wai Cheah,

    1. Centre for Advanced Luminescence Materials and Department of Physics Hong Kong Baptist University Hong Kong SAR (PR China)
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  • Chin Hsin Chen

    1. Display Institute Microelectronics and Information Systems Research Center National Chiao Tung University Hsinchu (Taiwan)
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Abstract

A new host material for use in phosphorescent OLEDs with desirable electronic properties has been synthesized. The material exhibits superior carrier-transport properties, a narrow optical band gap, relatively high triplet energy, and high thermal stability. It is synthesized by integrating hole-transporting carbazole groups into an electron-transporting phenanthroline core (see figure), and is demonstrated to be an excellent host for phosphorescent dopant emitters.

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