Luminescent properties of Ce in MSO4 (M: Ca, Sr and Ba) and the effect of Na co-doping |
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Authors: | A P Vink E van der Kolk P Dorenbos C W E van Eijk |
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Institution: | Interfaculty Reactor Institute, Delft University of Technology, Mekelweg 15, 2629 JB, Delft, Netherlands |
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Abstract: | The optical properties of Ce3+ in CaSO4, SrSO4 and BaSO4 are reported. The Ce3+ ion shows 4f05d1→2F5/2,2F7/2 luminescence in all three sulphates. Co-doping with Na+ does not change the local surrounding of the Ce3+ ion, but enhances the amount of Ce3+ ions built in. Under optical excitation, besides the typical Ce3+ doublet emission in the ultraviolet spectral region, band emission around 445 nm was observed. This band emission was not assigned to emission from a Ce3+ centre, but to emission from an impurity-trapped exciton. Under X-ray excitation, both Ce3+ emission and an emission band around 380 nm was observed. This band was assigned to emission from a self-trapped exciton. |
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Keywords: | Ce3+ Sulfates 4f05d1 bands Luminescence |
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