Precipitation Synthesis and Low Temperature Luminescence Prosperities of Zn2SiO4:Mn2+ Green Phosphor
Green phosphor Zn2SiO4: Mn2 + for PDP was synthesized by precipitation reaction. The sample was characterized by X-ray diffraction (XRD), scanning electronic microscope (SEM), vacuum ultraviolet (VUV) spectra, ultraviolet (UV) spectra and FT-IR spectrum. XRD pattern shows that the sample is pure phase of Zn2SiO4 and well-crystallized. SEM image reveals that the sample shows nearly spherical morphology and the particles sizes are between 1 μm and 5 μm. VUV and UV emission spectra at 20 K, 50 K and 100 K show that the low temperature luminescence intensities of the peaks at 523 nm which correspond to the 4T1 (4G)→6A1(6S) transitions of Mn2 + ions become weak with the increasing of the measured temperature under 147 nm and 254 nm excitation. The excitation spectrum illustrates two strong absorption peaks at around 210 nm and 243 nm, which are ascribed to the transitions of the charge transfer states when 523 nm emission is monitored. The absorption peaks of SiO2, vjSiO4(j = 1, 2,3) and vjZnO4(j = 1, 3) could be observed in FT-IR spectrum.
PDP Zn2SiO4: Mn2+ Vacuum ultraviolet Low Temperature Luminescence
Tian Xia Weidong Zhuang Xiangzhong Cui Chunlei Zhao Xiaowei Huang
National Engineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous Metals and Grirem Advanced Materials Co. Ltd., Beijing 100088, China
国际会议
上海
英文
1723-1726
2007-03-12（万方平台首次上网日期，不代表论文的发表时间）