Luminescence of Ce3+ at two different sites in α-Sr2P2O7 under vacuum ultraviolet-UV and x-ray excitation
Abstract
A series of Ce3+ doped α-Sr2-2xCexNaxP2O7 phosphor compounds has been prepared using a high-temperature solid-state reaction technique. The luminescence properties under vacuum ultraviolet-UV and x-ray excitation were studied. Luminescence spectra reveal three UV-emitting peaks at about 310, 330, and 350 nm from which we conclude that Ce3+ occupies two distinct sites in α-Sr2P2O7. The influences of the doping concentration, the temperature, and the excitation wavelength on the luminescence of Ce3+ at the Ce(I) and Ce(II) sites together with the decay characteristics are discussed. The light yield under x-ray excitation is found to be around 10 000 photons/MeV.
- Publication:
-
Journal of Applied Physics
- Pub Date:
- October 2010
- DOI:
- 10.1063/1.3500333
- Bibcode:
- 2010JAP...108h3527H
- Keywords:
-
- cerium;
- cerium compounds;
- doping profiles;
- luminescence;
- phosphors;
- sodium compounds;
- strontium compounds;
- ultraviolet radiation effects;
- X-ray effects;
- 78.55.Hx;
- 61.80.Cb;
- 61.80.Ba;
- 61.72.up;
- 61.72.sd;
- Other solid inorganic materials;
- X-ray effects;
- Ultraviolet visible and infrared radiation effects;
- Other materials;
- Impurity concentration