Di-calcium magnesium silicate(Ca_(2)MgSi_(2)O_(7))doped with various concentrations(1.0 mol%,2.0 mol%,2.5 mol%,and 3.0 mol%)of dysprosium(Ⅲ)was prepared using a high-temperature technique named as solid state reactio...Di-calcium magnesium silicate(Ca_(2)MgSi_(2)O_(7))doped with various concentrations(1.0 mol%,2.0 mol%,2.5 mol%,and 3.0 mol%)of dysprosium(Ⅲ)was prepared using a high-temperature technique named as solid state reaction method.The sample with 2.5 mol%of dysprosium(Ⅲ)underwent X-ray diffraction(XRD)characterization to confirm the proper phase formation in the sample.Observed XRD pattern matched significantly with crystallographic open database(Card No.96-210-6180)with a significantly high figure of merit(0.84).Photoluminescence(PL)excitation and emission spectra were also recorded.PL excitation spectrum of Ca_(2)MgSi_(2)O_(7)doped with 2.5 mol%of dysprosium(Ⅲ)exhibited a most prominent peak at 395 nm,therefore,the emission spectra of the samples were monitored at 395 nm excitation.The emission spectra exhibited prominent peaks centered at 483 nm(blue),577 nm(yellow),and 664 nm(orange red)due to the transitions ^(4)F_(9/2)→^(6)H_(15/2),^(4)F_(9/2)→^(6)H_(13/2),and ^(4)F_(9/2)→^(6)H_(11/2),respectively.The Commission Internationale de L’Eclairage(CIE)of this emission spectra was found at(0.304,0.340)which lies in the white light region.Keeping the objective to evaluate the emitted white light for its suitability in light-emitting diode(LED)application,color rendering index(CRI)and color correlated temperature(CCT)were also calculated.Radiation life time was estimated using Judd-Ofelt analysis.展开更多
文摘Di-calcium magnesium silicate(Ca_(2)MgSi_(2)O_(7))doped with various concentrations(1.0 mol%,2.0 mol%,2.5 mol%,and 3.0 mol%)of dysprosium(Ⅲ)was prepared using a high-temperature technique named as solid state reaction method.The sample with 2.5 mol%of dysprosium(Ⅲ)underwent X-ray diffraction(XRD)characterization to confirm the proper phase formation in the sample.Observed XRD pattern matched significantly with crystallographic open database(Card No.96-210-6180)with a significantly high figure of merit(0.84).Photoluminescence(PL)excitation and emission spectra were also recorded.PL excitation spectrum of Ca_(2)MgSi_(2)O_(7)doped with 2.5 mol%of dysprosium(Ⅲ)exhibited a most prominent peak at 395 nm,therefore,the emission spectra of the samples were monitored at 395 nm excitation.The emission spectra exhibited prominent peaks centered at 483 nm(blue),577 nm(yellow),and 664 nm(orange red)due to the transitions ^(4)F_(9/2)→^(6)H_(15/2),^(4)F_(9/2)→^(6)H_(13/2),and ^(4)F_(9/2)→^(6)H_(11/2),respectively.The Commission Internationale de L’Eclairage(CIE)of this emission spectra was found at(0.304,0.340)which lies in the white light region.Keeping the objective to evaluate the emitted white light for its suitability in light-emitting diode(LED)application,color rendering index(CRI)and color correlated temperature(CCT)were also calculated.Radiation life time was estimated using Judd-Ofelt analysis.
