Photoluminescence of Cerium(Ⅲ)in Lanthanum Strontium Halophosphates
来源期刊：Journal of Rare Earths1991年第2期
论文作者：刘世香 黄竹坡 廖复辉
文章页码：112 - 115
摘 要：<正> La1.5Sr7.0Na1.5（PO4）6X′X″（X′and X″stand for two identical or different halide ions F-,Cl-,and Br-）is anew kind matrix of phosphors.X-ray analysis shows that these crystals belong to the apatite structure ofhexagonal system with a space group of p63/m.Their lattice parameters have been obtained.Subsolidus phaserelationship in the double halophosphate systems were determined by lattice parameter method.It has beenproved that in the Br-Cl and F-Cl systems there exist complete and continuous solid solutions.In the F-Br sys-tem there appears a two phase region with the bromide composition 0.75<Br<1.25.The variation of emission intensity of Ce3+with the change of halogen composition has been observed.Fluorescence spectroscopic study unraveled that there exist two types of luminescent center in Ce3+activatedLa1.5Sr7.0Na1.5（PO4）6X′X″crystals.The temperature dependence of the peak wavelength was determined.Astemperature is raised,emission bands shift towards blue.
刘世香，黄竹坡，廖复辉
摘 要：<正> La1.5Sr7.0Na1.5（PO4）6X′X″（X′and X″stand for two identical or different halide ions F-,Cl-,and Br-）is anew kind matrix of phosphors.X-ray analysis shows that these crystals belong to the apatite structure ofhexagonal system with a space group of p63/m.Their lattice parameters have been obtained.Subsolidus phaserelationship in the double halophosphate systems were determined by lattice parameter method.It has beenproved that in the Br-Cl and F-Cl systems there exist complete and continuous solid solutions.In the F-Br sys-tem there appears a two phase region with the bromide composition 0.75<Br<1.25.The variation of emission intensity of Ce3+with the change of halogen composition has been observed.Fluorescence spectroscopic study unraveled that there exist two types of luminescent center in Ce3+activatedLa1.5Sr7.0Na1.5（PO4）6X′X″crystals.The temperature dependence of the peak wavelength was determined.Astemperature is raised,emission bands shift towards blue.
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