The VUV Luminescence Properties

The VUV Luminescence Properties of M2SiO4:RE (M=Mg, Sr, Ba, RE=Tm～(3+),Tb～(3+))
　　Now, more and more scholars pay their attention to the phosphors used for PDP (plasma display panel). Silicate phosphors are promising as candidates of host materials for the new VUV phosphors with various crystal structures and high chemical stability. Neodymium Magnets In this article, it was attempted to prepare rare ion doped M2SiO4 phosphor by the solid-state reaction and their luminescent properties under VUV were investigated.The X-ray powder diffraction data of M2SiO4: RE (M=Mg, Sr, Ba, RE=Tm3+, Tb3+) is in agreement of JCPDS standard card (87-0061, 39-1256, 26-1403), which indicates that the doped rare ion have little influence on the structure of luminescent host. It indicates that single-phased M2SiO4 phosphor can be obtained in such synthesis process.The VUV excitation spectrum under 457nm of M2SiO4: Tm3+ (M=Mg, Sr, Ba) shows two peaks at about 170nm and 190nm and a broad excitation band from 211nm to 300nm. The former can be http://www.999magnet.com/ assigned to the absorption of the host lattice, which is shifted towards longer wavelengths as the radius of alkali earth ion in M site increases