Journal
TETRAHEDRON
Volume 70, Issue 11, Pages 2015-2019Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2014.01.073
Keywords
Carbazole; Oxadiazole; Fluorescence; Donor-acceptor system; Organic light-emitting device
Categories
Funding
- National Natural Science Foundation of China [60906022]
- Scientific Developing Foundation of Tianjin Education Commission, China [2011ZD02]
- Tianjin Natural Science Council [10SYSYJC28100]
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The synthesis is reported of a new molecule consisting of N-phenylcarbazole linked through a butadiyne bridge to 2,5-diphenyl-1,3,4-oxadiazole. The compound shows blue photoluminescence with positive solvatochromism: e.g., lambda(max) 401 nm in cyclohexane, 461 nm in chloroform solution (quantum yield phi(f) 0.55) and 428 nm in thin film, with a low intensity band extending to ca. 700 nm in films. OLEDs with a device configuration of [ITO/PEDOT:PSS (50 nm)/molecule:PVK:OXD-7 (80 nm)/Bphen (20 nm)/LiF (0.8 nm)/AI (120 nm)I were fabricated. Pure white-light emission with Commission Internationale De L'Eclairage (CIE) coordinates of (0.313, 0.330) at 13 V and good colour stability with a very small offset of coordinates (0.034, 0.033) under biases of 9-15 V has been achieved. (C) 2014 Elsevier Ltd. All rights
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