Luminescent material Ba3Gd(BO3)3 doped with Eu3+ ion was prepared by high temperature solid-state method.The preparing conditions, luminescent properties, and particle morphology of Ba3Gd(BO3)3:Eu3 + phosphor w...Luminescent material Ba3Gd(BO3)3 doped with Eu3+ ion was prepared by high temperature solid-state method.The preparing conditions, luminescent properties, and particle morphology of Ba3Gd(BO3)3:Eu3 + phosphor were studied with X-ray diffraction(XRD), fluorescence spectroscopy, and scanning electron microscopy(SEM).The results obtained by XRD showed that pure phase of Ba3Gd(BO3)3 was obtained at 1000 °C.Images from SEM displayed that the particles of Ba3Gd(BO3)3:Eu3+ phosphor had a spherical shape with an average diameter of about 200-400 nm.The luminescence spectra showed that Ba3Gd(BO3)3:Eu3+ phosphor was effectively excited by the near ultraviolet(UV) light(396 nm) and blue light(466 nm).The main emission peaks of Ba3Gd(BO3)3:Eu3+ phosphor were assigned to the supersensitive transition 5D0-7F2(611 and 616 nm) of Eu3+ ion when samples were excited at 255 and 396 nm, respectively, and the luminescent intensity of Ba3Gd(BO3)3:Eu3+ at 611 and 616 nm reached to the maximum when the doped content of Eu3+ ion was 10mol.%.Therefore, this phosphor could be a promising red component for possible applications in the field of white LED.展开更多
The Ba3Y2(BO3)4:Eu^3+ phosphor was synthesized using a high temperature solid-state reaction method and the luminescent characteristics were investigated. The emission spectrum exhibited one strong red emission at...The Ba3Y2(BO3)4:Eu^3+ phosphor was synthesized using a high temperature solid-state reaction method and the luminescent characteristics were investigated. The emission spectrum exhibited one strong red emission at 613 nm, corresponding to the electric dipole 5D0-TF2 transition of Eu^3+, under 365 nm excitation. The excitation spectrum of 613 nm indicated that the Ba3Y2(BO3)n:Eu^3+ phosphor was effectively excited by ultraviolet (UV) (254, 365 and 400 nm) and blue (470 nm) light. The effect of Eu^3+ concentration on the 613 nm emission of the Ba3Y2(BO3)n:Eu^3+ phosphor was measured. The results showed that the emission intensity increased with increasing Eu^3+ concentration, and then decreased. The CIE color coordinates of Ba3Y2(BO3)4:Eu^3+ phosphor were x=0.641 and y=0.359 at 15 mol.% Eu^3+.展开更多
基金supported by the Science Foundation of Guangxi Province (0731014)the Large-Scale Instrument of Guangxi Cooperates and Shares the Net Work (496-2007-075)the Innovation Project of Guangxi Graduate Education (2008105930817M74)
文摘Luminescent material Ba3Gd(BO3)3 doped with Eu3+ ion was prepared by high temperature solid-state method.The preparing conditions, luminescent properties, and particle morphology of Ba3Gd(BO3)3:Eu3 + phosphor were studied with X-ray diffraction(XRD), fluorescence spectroscopy, and scanning electron microscopy(SEM).The results obtained by XRD showed that pure phase of Ba3Gd(BO3)3 was obtained at 1000 °C.Images from SEM displayed that the particles of Ba3Gd(BO3)3:Eu3+ phosphor had a spherical shape with an average diameter of about 200-400 nm.The luminescence spectra showed that Ba3Gd(BO3)3:Eu3+ phosphor was effectively excited by the near ultraviolet(UV) light(396 nm) and blue light(466 nm).The main emission peaks of Ba3Gd(BO3)3:Eu3+ phosphor were assigned to the supersensitive transition 5D0-7F2(611 and 616 nm) of Eu3+ ion when samples were excited at 255 and 396 nm, respectively, and the luminescent intensity of Ba3Gd(BO3)3:Eu3+ at 611 and 616 nm reached to the maximum when the doped content of Eu3+ ion was 10mol.%.Therefore, this phosphor could be a promising red component for possible applications in the field of white LED.
基金Project supported by the Hebei Provincial Technology Development Foundation (51215103b)Science Foundation of Hebei University (2006Q06)
文摘The Ba3Y2(BO3)4:Eu^3+ phosphor was synthesized using a high temperature solid-state reaction method and the luminescent characteristics were investigated. The emission spectrum exhibited one strong red emission at 613 nm, corresponding to the electric dipole 5D0-TF2 transition of Eu^3+, under 365 nm excitation. The excitation spectrum of 613 nm indicated that the Ba3Y2(BO3)n:Eu^3+ phosphor was effectively excited by ultraviolet (UV) (254, 365 and 400 nm) and blue (470 nm) light. The effect of Eu^3+ concentration on the 613 nm emission of the Ba3Y2(BO3)n:Eu^3+ phosphor was measured. The results showed that the emission intensity increased with increasing Eu^3+ concentration, and then decreased. The CIE color coordinates of Ba3Y2(BO3)4:Eu^3+ phosphor were x=0.641 and y=0.359 at 15 mol.% Eu^3+.