Facile preparation of Y2.9Ce0.1Al5O12 nano-phosphors without photobleaching behavior

Y2.9Ce0.1Al5O12 (YAG:Ce3+) phosphors with 80 +/- 5 nm are successfully prepared by hydrothermal processing followed by the post annealing process in Ar/15%H-2 atmosphere. The emission intensity of the as-prepared YAG:Ce3+ nano-phosphor is as high as with that of the similar to 15 mu m YAG:Ce3+ commercial phosphor. Meanwhile, the YAG:Ce3+ nano-phosphors prepared in both Ar/15%H-2 and air atmosphere show same stable emission intensity Under continuous irradiation of blue excitation light, although this photobleaching behavior is easily observed for YAG:Ce3+ nano-phosphors in the literatures. Photobleaching is probably suppressed by complete crystallinity due to the post annealing process and solid morphology due to the hydrothermal process in the present work. (C) 2012 Elsevier B.V. All rights reserved.