Preparation and characterization of rare-earth-doped Y2O3 luminescent ceramics by the use of reverse micelles

作者：Graeve Olivia A^*; Corral Jessica O

来源：Optical Materials, 2006, 29(1): 24-30.

DOI：10.1016/j.optmat.2006.03.013

• microemulsion
• photoluminescence
• nanostructured powders
• micelle

The objective of this project was to study luminescent powders of Y2O3:Eu3+ (5 at%), Y2O3:Tb3+ (5 at%), and Y2O3:Tm3+,Yb3+ (Tm: 2 at%, Yb: 1 at%), prepared by the use of reverse micelles. This report describes the phase stability, crystallite size, and luminescence properties of these powder materials as a function of heat treatment time and temperature. The Y2O3 phase produced during synthesis can be controlled by the heat treatment temperature and time. Monoclinic and cubic phases Of YI-03 are obtainable, with the monoclinic powders produced at the smaller crystallite sizes. Photoluminescence properties of the Y2O3:Eu3+ and Y2O3:Tb3+ were evaluated and sharp emission was observed for the Eu3+ powders at 610 nm and the Tb3+ powders at 544 nm. The maximum emission intensity of both phosphors increased as annealing temperature and time increased. This, however, was not seen for the case of the Y2O3:Tm3+,Yb3+ powders, which exhibited emission at 454 nm. For this phosphor, as heat treatment temperature increased the luminescence intensity decreased.

• 出版日期2006-10