Journal
JOURNAL OF RARE EARTHS
Volume 28, Issue 5, Pages 693-696Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1002-0721(09)60181-2
Keywords
solid-state lighting; Eu2+ ions; photoluminescence; aluminates; rare earths
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Funding
- Korea government (Ministry of Education, Science and Technology, MEST) [2009-0078682]
- National Research Foundation of Korea [핵06B2812] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A new aluminate host material Ca3ZnAl4O10 doped with Eu2+ was prepared by a high-temperature solid-state reaction method, and a pure crystalline phase of Ca3ZnAl4O10 was confirmed with X-ray powder diffraction (XRD) measurement. The luminescent property was investigated with excitation and emission spectra. The phosphor could be excited by UV light from 220 nm to 400 nm and emitted a blue luminescence peaked at 450 nm, which corresponded to the 4f(6)5d(1)-> 4f(7) transition of Eu2+ ions. The dependence of luminescence intensities of Eu2+-doped Ca3ZnAl4O10 on the doping concentrations was investigated. The luminescence decay and the color coordinates were discussed in order to further investigate its potential applications for white light-emitting diode phosphors pumped by a near-UV chip.
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