Journal
APPLIED PHYSICS LETTERS
Volume 82, Issue 18, Pages 2975-2977Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1569038
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Development of white phosphors with highly emissive, stable, and less toxic characteristics has been important for display and lighting technology. In this letter, it is shown that sol-gel-derived glasses of aluminosilicate composition, followed by a heat treatment in air at low temperatures around 500 degreesC, exhibit two intense, visible photoluminescence bands: One is due to point defects in these glasses and the other comes from radical carbonyl-terminations on the surface of pores. The photoluminescence provides a white light with high luminescence quantum efficiency (similar to66.5%) under long-wavelength ultraviolet excitation. (C) 2003 American Institute of Physics.
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