Preparation and characterization of nanosized GdxBi0.95-xVO4:0.05Eu3+ solid solution as red phosphor
Abstract
A complete solid solutions with monophasic zircon-type structure of vanadates of formula GdxBi0.95-xVO4:0.05Eu3+ (x = 0-0.95) are synthesized by combined method of co-precipitation and hydrothermal synthesis. Their microstructures and morphologies are characterized by X-ray powder diffraction and transmission electronic microscope, and the results show that each of all the samples has a monophasic zircon-type structure. The absorption spectrum of the prepared phosphor shows a blue-shift of the fundamental absorption band edge with increasing the gadolinium content. Under UV-light and visible-light excitation, all the prepared phosphors show the typical luminescence properties of Eu3+ in the zircon-type structure. The emission intensity of GdxBi0.95-xVO4:0.05Eu3+ (x = 0.55) is strongest in all samples under UV-light and visible-light excitations. Finally, the mechanisms of luminescence of Eu3+ in the GdxBi0.95-xVO4:0.05Eu3+ (x = 0-0.95) solid solutions are analyzed and discussed.
- Publication:
-
Chinese Physics B
- Pub Date:
- October 2014
- DOI:
- 10.1088/1674-1056/23/10/104224
- Bibcode:
- 2014ChPhB..23j4224Y