Journal
JOURNAL OF LUMINESCENCE
Volume 129, Issue 12, Pages 1469-1474Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2009.02.029
Keywords
Luminescence; Y2O3; Sol-gel; Carbon defects
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In this paper, Y2O3 powder phosphors without metal activators were successfully prepared by the sol-gel method. The obtained sample shows an intense bluish-white emission (ranging from 350 to 600 nm, centered at 416 nm) under a wide range of UV light excitation (235-400 nm). The chromaticity coordinates of the sample are x = 0.159, y = 0.097, and the quantum yield is as high as 64.6%, which is a high value among the phosphor family without metal activators. The luminescent mechanisms have been ascribed to the carbon impurities in the Y2O3 host. (C) 2009 Elsevier B.V. All rights reserved.
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