期刊
JOURNAL OF LUMINESCENCE
卷 138, 期 -, 页码 195-200出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2013.01.020
关键词
Europium(III) complex; Diphenylethyne; beta-Diketonate; Phosphor; Light-emitting diode
类别
资金
- Natural Science Foundation of China [21102187]
- Science and Technology Planning Project of Guangdong Province [2012B010200039]
- Research Fund for the Doctoral Program of Higher Education of China [20090171120025]
- Fundamental Research Funds for the Central Universities [11lgpy11]
- Science and Technology Planning Project of Huizhou City [2011B020006010]
A new europium(III) ternary complex based on a fluorinated beta-diketonate ligand and 1,10-phenanthroline as an ancillary ligand has been prepared and evaluated as a candidate for light-emitting diode (LED). The complex exhibits a high decomposition temperature (316 degrees C). Photophysical properties such as FT-IR spectra, UV-vis absorption spectra, excitation and emission spectra, luminescence decay curve and quantum yield were investigated. The excitation band is well matched with the characteristic emission of 395 nm-emitting InGaN chips. The complex exhibits an efficient energy transfer pathway from the ligands to the central Eu3+ ion via a ligand-sensitized luminescence process. An intense red-emitting LED was fabricated by coating the complex onto a 395 nm-emitting InGaN chip, and its Commission International de l'Eclairage (CIE) chromaticity coordinate (x=0.6389, y=0.3255) is close to the National Television Standard Committee (NTSC) standard value for red color. Meanwhile, the energy transfer from the InGaN chip to the complex is very efficient. All the findings demonstrate the potential application of the Eu(III) complex as red-emitting phosphors for UV-based white LEDs. (c) 2013 Elsevier B.V. All rights reserved.
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