煅烧温度对白色长余辉发光材料Y_2O_2S:Tb^(3+),Sr^(2+),Zr^(4+)形貌及发光性能的影响  

Effect of Calcination Temperature on Morphology and Properties of White Long-lasting Phosphor Y_2O_2S:Tb^(3+),Sr^(2+),Zr^(4+)

作　　者：黄平[1] 杨帆[1] 崔彩娥[1,2] 王磊 雷星[1] 

机构地区：[1]太原理工大学物理与光电工程学院,太原030024 [2]太原理工大学测量控制技术研究所,太原030024

出　　处：《硅酸盐学报》2013年第6期776-781,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51072128);山西省攻关项目(2011032-1040–01);山西省优秀青年学术带头人项目(20110001)资助

摘　　要：采用高温固相法合成了白色长余辉发光材料Y2O2S:Tb3+,Sr2+,Zr4+,利用X射线衍射、扫描电子显微镜、荧光分光光度计、照度计和热释光谱仪研究了煅烧温度对样品物相、形貌及发光性能的影响。结果表明:在950℃煅烧时,样品为Y2O3与Y2O2S的混合相,其中Y2O3为主相;在1000和1 050℃煅烧时为纯的Y2O2S相;当温度高于1 050℃时。再次出现Y2O3相;用288 nm波长光激发样品,Tb3+发射峰形状与位置不变,其中位于417 nm蓝光与544 nm黄绿光主发射峰归属于Tb3+的5D3→7F5与5D4→7F5跃迁;当煅烧温度为1000℃时,样品的能级陷阱深度为0.64eV,余辉时间为160s(≥1mcd/m2)。The white-light long-lasting phosphor of Y2O2S：Tb3＋, Sr2＋, Zr4＋ was prepared by a solid state reaction method. The effect of calcination temperature on the phase, surface morphology and luminescent properties of the samples was investigated. The samples were characterized by X-ray diffractometer, scanning electron microscope, fluorescence spectrophotometer, illuminometer and ther- mally stimulated spectrometer, respectively. The results show that the samples are composed of Y202S and Y203 phases, in which Y2O3 is a major phase at the calcination temperature of 950 ℃. The pure Y202S phase was obtained at 1 000 and 1 050 ℃. Y203 phase appeared at 〉 1 050 ℃. The position and shape of Tb3＋ emission peaks under the 288 nm excitation appeared similar for all the sam- ples. The blue light emission at 417 nm and the yellowish-green light emission at 544 nm originated from the 5D_3→7F_5 and the 5D_4→7F_5 transitions of Tb3＋, respectively, The trap depth was 0.64 eV and the decay time was 160 s （≥1 mcd/m2） for the sample synthesized at 1 000 ℃.

关 键 词：白色长余辉 硫氧化钇 固相法 稀土 

分 类 号：O482[理学—固体物理]