Journal
DYES AND PIGMENTS
Volume 114, Issue -, Pages 146-150Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2014.10.025
Keywords
Carbazole; Phosphine oxide; High triplet energy; Blue phosphorescent device; Bipolar host; Thiophene
Funding
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [NRF-2012R1A1A1007364]
- Development of Core Technologies for Organic Materials Applicable to OLED Lighting with High Color Rendering Index - MOTIE
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A novel bipolar compound with a thiophene modified 9-phenylcarbazole and phosphine oxide moieties, (5-(4-(9H-carbazol-9-yl)phenyl)thiophen-2-yl)diphenylphosphine oxide (CPTPO), was synthesized and characterized as a high triplet energy host material. Bipolar charge transport character and a high triplet energy of 2.72 eV of CPTPO allowed the development of blue phosphorescent organic light-emitting diodes with an external quantum efficiency of 18.4%. (C) 2014 Elsevier Ltd. All rights reserved.
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