The Eu 2+ and Dy 3+ codoped Sr 2MgSi 2O 7: Eu 2+ ,Dy 3+ blue emission long afterglow phosphor was synthesized and its photoluminescence properties were studied. It is known with the measurement method of X ray diffrac...The Eu 2+ and Dy 3+ codoped Sr 2MgSi 2O 7: Eu 2+ ,Dy 3+ blue emission long afterglow phosphor was synthesized and its photoluminescence properties were studied. It is known with the measurement method of X ray diffraction pattern that the luminescent material is an akermanite crystal. It is shown with the decay curve that its afterglow properties are better than the traditional (Ca,Sr)S:Bi blue long afterglow phosphor. Its decay curve is in accordance with the calculated results of the formula lg I=A+B 1 ×lg t +B 2×(lg t ) 2. Ther moluminescence spectra identified the existence of long afterglow luminescence. The excitation and emission spectra and microstructure of the phosphor were also investigated in detail.展开更多
文摘The Eu 2+ and Dy 3+ codoped Sr 2MgSi 2O 7: Eu 2+ ,Dy 3+ blue emission long afterglow phosphor was synthesized and its photoluminescence properties were studied. It is known with the measurement method of X ray diffraction pattern that the luminescent material is an akermanite crystal. It is shown with the decay curve that its afterglow properties are better than the traditional (Ca,Sr)S:Bi blue long afterglow phosphor. Its decay curve is in accordance with the calculated results of the formula lg I=A+B 1 ×lg t +B 2×(lg t ) 2. Ther moluminescence spectra identified the existence of long afterglow luminescence. The excitation and emission spectra and microstructure of the phosphor were also investigated in detail.
