采用热蒸发法制备CdS及其稀土掺杂的纳米带(CdS∶Ce~(3+)、CdS∶Er~(3+)).利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)和荧光光谱仪(PL)对纳米带的形貌、晶体结构和发光性质进行了表征和分析.结果表明,所制备的纳米带的外形规则,表面光滑、平整,纳米带的厚度大约在20～60nm范围内;纳米带具有六方结构,晶格常数a=0.414nm、c=0.671nm;CdS纳米带的光致发光谱的谱峰位于405nm左右;CdS∶Ce~(3+)纳米带的光致发光谱的谱峰位于523和535nm处;CdS∶Er~(3+)纳米带的光致发光谱中观察到3个强的发光峰,分别位于525、556和582nm处.
CdS and rare earth-doped CdS nanobelts were synthesized by thermal evaporation method.These synthesized nanobelts were characterized with scanning electron microscopy (SEM),X-ray diffraction (XRD) and photoluminescence spectroscopy (PL).SEM images show that each nanobelt has a uniform width along its entire length,flat and smooth surface.A typical thickness of these nanobelts is in the range of tens of nanometers.XRD pattern confirmed that nanobelts are hexagonal wurtzite structure with lattice constants a=0.414nm and c=0.671nm.Room-temperature photoluminescence spectra of the CdS nanobelt revealed that the emission band is centered at about 405nm.CdS∶Ce~(3+) nanobelts shows two emission bands centered at 523 and 535nm.CdS∶Er~(3+) nanobelts shows three emission bands centered at 525,556,and 582nm respectively.
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