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Luminescent properties of Ce3+ in MSO4 (M: Ca, Sr and Ba) and the effect of Na+ co-doping

Author:
A.P Vink   E van der Kolk   P Dorenbos   C.W.E van Eijk  


Journal:
Optics Communications


Issue Date:
2002


Abstract(summary):

The optical properties of Ce 3+ in CaSO 4, SrSO 4 and BaSO 4 are reported. The Ce 3+ ion shows 4f 05d 1 rarr 2F 5/2, 2F 7/2 luminescence in all three sulphates. Co-doping with Na + does not change the local surrounding of the Ce 3+ ion, but enhances the amount of Ce 3+ ions built in. Under optical excitation, besides the typical Ce 3+ doublet emission in the ultraviolet spectral region, band emission around 445 nm was observed. This band emission was not assigned to emission from a Ce 3+ centre, but to emission from an impurity-trapped exciton. Under X-ray excitation, both Ce 3+ emission and an emission band around 380 nm was observed. This band was assigned to emission from a self-trapped exciton


Page:
277-284


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