Journal
JOURNAL OF LUMINESCENCE
Volume 152, Issue -, Pages 230-233Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2013.10.001
Keywords
Nitridosilicate; Luminescence; Afterglow
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A novel nitridosilicate phosphor, BaSi7N10:Eu2+, was synthesized via the nitridation of Ba1-xEuxSi alloy. Oxide impurities in the product can be significantly reduced by the use of alloy precursor to obtain a single phase product. The synthesized BaSi7N10:Eu2+ absorbs strongly in the UV-part of the electromagnetic spectrum and exhibits bluish-green light with a peak wavelength at 475 nm. When temperature is increasing, its emission intensity is decreasing with the broadening full widths at half maximum (FWHM). Interestingly, the afterglow emission of Eu2+ (4f(6)5d(1)-> 4f(7)) could be observed after switching off the 280 nm excitation source, which to the best of our knowledge is found for the first time. This simple, inexpensive and high-yield synthesis route has a significant potential to be applied to other nitrides. (C) 2013 Elsevier B.V. All rights reserved.
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