期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 143, 期 3, 页码 1265-1270出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2013.11.032
关键词
Organometallic compounds; Polymers; Electrochemical properties; Luminescence
资金
- National Natural Science Foundation of China [51273168, 50973053, 21172187]
- Hunan Provincial Natural Science Foundation of China [11JJ3061]
- Scientific Research Fund of Hunan Provincial Education Department [13A102, 10A119, 11CY023]
- Science Foundation of Hunan Province [2009FJ2002]
- Provincial Natural Science Foundation of Hunan [12JJ7002]
A novel tris(dibenzoylmethanato)[5-(2-(4-tert-butylbenzenyl)-5-benzenyl-1,3,4-oxadiazole-4')-1,10-phenanthroline]europium(III) [Eu(DBM)(3)(BuOXD-Phen)] containing an electron-transporting oxadiazole-functionalized phenanthroline ligand was synthesized and characterized. Its UV-vis absorption and photoluminescence (PL), as well as the electroluminescence (EL) in polymer light-emitting devices (PLEDs) were investigated. The double-layer PLEDs with a configuration of ITO/PEDOT:PSS (50 nm)/PVK (40 nm)/PFO:PBD (30%):Eu(DBM)(3)(BuOXD-Phen) (1-8 wt %) (80 nm)/Ba (4 nm)/AI (150 nm) were fabricated. Saturated red Eu3+ ion emission, based on the D-3(0) -> F-7(2) transition, is centered at a wavelength of 614 nm with a full width at half maximum (FWHM) of 10 nm. The highest external quantum efficiency (QE(ext)) of 1.26% at current density of 1.65 mA cm(-2), with a maximum brightness of 568 cd m(-2) at 137.8 mA cm(-2) was achieved from the device at 1 wt % dopant concentration. (C) 2013 Elsevier B.V. All rights reserved.
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