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New Host Containing Bipolar Carrier Transport Moiety for High‐Efficiency Electrophosphorescence at Low Voltages
Author(s) -
Gao Zhi Qiang,
Luo Meiming,
Sun Xiao Hua,
Tam Hoi Lam,
Wong Man Shing,
Mi Bao Xiu,
Xia Ping Fang,
Cheah Kok Wai,
Chen Chin Hsin
Publication year - 2009
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200702877
Subject(s) - materials science , phosphorescence , dopant , carbazole , optoelectronics , oled , moiety , electroluminescence , nanotechnology , photochemistry , doping , fluorescence , optics , chemistry , physics , layer (electronics) , stereochemistry
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.