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中文摘要：
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1050℃煅烧时为纯的Y2O2S相；当温度高于1050℃时。再次出现Y2O3相；用288nm波长光激发样品，Tb3＋ 发射峰形状与位置不变，其中位于417nm蓝光与544nm黄绿光主发射峰归属于Tb3＋的5D_3→7F_5当5D_4→7F_5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）。
英文摘要：
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 ℃.
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