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dc.contributor.author채근화-
dc.contributor.author원성옥-
dc.contributor.authorAnkush Vij-
dc.contributor.authorShalendra Kumar-
dc.contributor.authorAbhinav Dubey-
dc.contributor.authorRavi Kumar-
dc.date.accessioned2021-06-09T04:20:30Z-
dc.date.available2021-06-09T04:20:30Z-
dc.date.issued2018-09-
dc.identifier.citationVOL 227-171-
dc.identifier.issn0167-577X-
dc.identifier.other51183-
dc.identifier.urihttp://pubs.kist.re.kr/handle/201004/67952-
dc.description.abstractThe quest of improving luminescence efficiency in alkaline earth sulfide phosphors has been of great interest due to their applications in diverse areas. We synthesized SrS:Ce0.05, Sr0.75Ba0.20S:Ce0.05, Sr0.75Ca0.20S:Ce0.05 and Sr0.75Ca0.10Ba0.10S:Ce0.05 phosphors using solid state diffusion method. X-ray diffraction patterns of all the samples were found similar to the cubic SrS phase except minor shifts in angles. To ascertain the valence state of Ce, near edge X-ray absorption fine structure spectroscopy was employed using synchrotron radiations. We simulated Ce M5,4-edges of Ce3+ ions using atomic multiplet calculations, which agrees well with the experimental data, clearly suggesting that Ce enters as Ce3+ in all the samples. The photoluminescence spectra of synthesized phosphors exhibit blue-green emission assigned to the 5d-4f transitions in Ce3+ levels, with minor shifts in wavelength. Interestingly, Ca2+/Ba2+substitution in SrS:Ce phosphors increases the PL intensity considerably. In comparison to SrS:Ce0.05 , PL intensity of Sr0.75Ca0.10Ba0.10S:Ce0.05 phosphors was enhanced by 2.7 times, which may be exploited in many optical applications.-
dc.publisherMaterials letters-
dc.subjectPhosphors-
dc.subjectSolid solutions-
dc.subjectPhotoluminescence-
dc.subjectNEXAFS-
dc.titleEnhanced photoluminescence response of Ca2+/Ba2+ substituted solid solutions of SrS:Ce phosphors-
dc.typeArticle-
dc.relation.page169171-
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