The photoluminescence spectra and excitation spectra in the vacuum ultraviolet (VUV) and ultraviolet (UV) spectra region of GdVO 4∶Eu 3+ were reported. The excitation and emission spectra indicate that GdVO 4...The photoluminescence spectra and excitation spectra in the vacuum ultraviolet (VUV) and ultraviolet (UV) spectra region of GdVO 4∶Eu 3+ were reported. The excitation and emission spectra indicate that GdVO 4∶Eu 3+ is a highly efficient phosphor for the excitation in the VUV and UV spectrum region. The excitation band in the VUV and UV spectrum region of 60～350 nm consists mainly of the absorption of host, which has obvious absorption of 4f n-1 5d of Eu 3+ and Gd 3+ . In GdVO 4∶Eu 3+ , there is the energy transfer: VO 4 3- →Eu 3+ , Gd 3+ →Eu 3+ and Gd 3+ →VO 4 3- →Eu 3+ . Through the last two procedures, maybe the quantum cutting of Gd 3+ -Eu 3+ occurs.展开更多
The (Y,Gd)BO 3∶Eu phosphor was synthesized by solid state reaction. The UV spectra showed that in a certain range of Gd 3+ concentration, more Gd 3+ absorbed energy and transferred it to Eu 3+ with its increasing con...The (Y,Gd)BO 3∶Eu phosphor was synthesized by solid state reaction. The UV spectra showed that in a certain range of Gd 3+ concentration, more Gd 3+ absorbed energy and transferred it to Eu 3+ with its increasing concentration. From the spectra in VUV region, it was observed that both the doping and the concentrations of Gd 3+ , Eu 3+ greatly affected the absorption of the host lattice. The absorbances at 147 nm and 170 nm increased when the Gd 3+ was doped which can be explained as that Gd 3+ transferred energy to BO 4. The optical properties of (Y,Gd)BO 3∶Eu were the best when the concentration of Eu 3+ was about 0.04.展开更多
文摘The photoluminescence spectra and excitation spectra in the vacuum ultraviolet (VUV) and ultraviolet (UV) spectra region of GdVO 4∶Eu 3+ were reported. The excitation and emission spectra indicate that GdVO 4∶Eu 3+ is a highly efficient phosphor for the excitation in the VUV and UV spectrum region. The excitation band in the VUV and UV spectrum region of 60～350 nm consists mainly of the absorption of host, which has obvious absorption of 4f n-1 5d of Eu 3+ and Gd 3+ . In GdVO 4∶Eu 3+ , there is the energy transfer: VO 4 3- →Eu 3+ , Gd 3+ →Eu 3+ and Gd 3+ →VO 4 3- →Eu 3+ . Through the last two procedures, maybe the quantum cutting of Gd 3+ -Eu 3+ occurs.
文摘The (Y,Gd)BO 3∶Eu phosphor was synthesized by solid state reaction. The UV spectra showed that in a certain range of Gd 3+ concentration, more Gd 3+ absorbed energy and transferred it to Eu 3+ with its increasing concentration. From the spectra in VUV region, it was observed that both the doping and the concentrations of Gd 3+ , Eu 3+ greatly affected the absorption of the host lattice. The absorbances at 147 nm and 170 nm increased when the Gd 3+ was doped which can be explained as that Gd 3+ transferred energy to BO 4. The optical properties of (Y,Gd)BO 3∶Eu were the best when the concentration of Eu 3+ was about 0.04.
