中文摘要：

在乙二醇-蒸馏水混合溶剂中，以水热法制备出不同钇（Y3＋）掺杂浓度的钨酸铅（PbWO4）微晶，并利用X射线衍射（XRD）、X射线荧光光谱（XRF）和光致发光光谱（PL）分别对样品的结构和发光性能进行了表征。结果显示，Y3＋掺杂使PbWO4微晶的发光强度最大提高了近4倍。且随着Y3＋掺杂浓度的增加发光峰位红移近40nm；另外，通过对发光曲线的高斯拟合发现，所有的发光峰都是由蓝光峰、绿光峰、黄光峰和红光峰组成，并分别探讨它们的可能起源及Y3＋掺杂对它们所产生的影响。

英文摘要：

PbWO4 microcrystals with different Y3＋ doping concentration were prepared by hydrothermal method in an ethylene glycol-distilled water mixed solvents, and were characterized by X-ray diffraction （XRD）, X-ray fluorescence （XRF） and photoluminescence （PL） spectra. The results revealed that the relative intensity of lumines cenee of Y3＋ doped PbWO4 microcrystals increased about 4 times than that of pure PhWO4 microerystals, and with the consecutive increase of Y3＋ doping concentration there were 40nm red-shifts in the center of luminescence peak. Based on the Gaussian fit for the luminescence peak, it could be found that all of luminescence peak were composed of blue band, green band, yellow band and red band, and the possible origins and the influence of these bands with increasing of Y3＋ doping concentration were diseussed, respectively.