A New Co-Activator Gd2O3 to Eu2O3 and Dy2O3 Doped Alkaline Earth Silicate Phosphors
Three alkaline earth silicate phosphors: Sr<,2>MgSi <,2>O<,7>: Eu, Dy, Gd, Sr<,3>MgSi<,2>O<,8>: Eu, Dy, Gd and Sr<,2>MgSi<,2>O<,7>: Eu, Dy were prepared and their luminescent properties were investigated. The Photoluminescence (PL) measurements indicated that the phosphors gave a longer emitting phosphorescence phenomenon by comparing with those without Gd<,2>O <,3> activator, in which a better afterglow characteristic was observed by adding Gd<,2>O<,3> to the phosphors. While little influence on the structure of luminescent materials was observed via XRD spectra, and obvious emission wavelength shift was exhibited due to the differences in the structure parameters of the two hosts. The results revealed that the improvement was due to nonequivalent substitution to produce more e-traps, and energy transfer from Gd<3+> to Dy<3+>, to boost the performance of Sr<,2>MgSi<,2>O<,7>: Eu, Dy phosphor. Role of Gd<3+> co-doped into Sr<,2>MgSi<,2>O<,7>: Eu, Dy matrix and the possible long-lasting phosphorescence progress were discussed.
Sr<,2>MgSi<,2>O<,7> Sr<,3>MgSi<,2>O<,8> Gd<3+> luminescent afterglow rare earths
Pan Wen(潘文) Ning Guiling(宁桂玲) Lin Yuan(林源) Yang Xuefeng(杨雪峰)
State Key Laboratory of Fine Chemicals, Department of Materials Science and Chemical Engineering, Sc State Key Laboratory of Fine Chemicals, Department of Materials Science and Chemical Engineering, Sc
国际会议
第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)
包头
英文
305-309
2007-08-07（万方平台首次上网日期，不代表论文的发表时间）