Journal
SYNTHETIC METALS
Volume 181, Issue -, Pages 18-22Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2013.08.003
Keywords
Carbazole; Phosphine oxide; High triplet; Deep blue; Phosphorescent
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A high triplet energy material with carbazole and phosphine oxide, phenylbis(9-pheny1-9H-carbazol-3-yl)phosphine oxide (3DCPO), was synthesized as a bipolar host material for deep blue phosphorescent organic light emitting diodes. The 3DCPO host material showed a high triplet energy of 3.01 eV, which was high enough for deep blue phosphorescent organic light-emitting diodes. Deep blue phosphorescent organic light-emitting diodes with the 3DCPO host material exhibited high external quantum efficiency of 18.8% at 3% doping concentration. (C) 2013 Elsevier B.V. All rights reserved.
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