4.8 Article

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

Journal

ADVANCED MATERIALS
Volume 21, Issue 6, Pages 688-+

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.200702877

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Funding

  1. Research Grants Council
  2. Earmarked Research [HKBU20180/05P]
  3. Hong Kong Innovation and Technology Commission Guangzhou-Hong Kong Industrial Support [ITC/05-06/02]
  4. Nanjing University of Post and Telecommunications [NY207013]

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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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