CdS∶Y^(3+)纳米带的制备及其光致发光特性

Synthesis and photoluminescence properties of CdS∶Y^(3+) nanobelts

采用热蒸发法制备CdS∶Y^(3+)纳米带.利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)对纳米带的形貌、晶体结构进行表征;利用荧光光谱仪(PL)对纳米带的光致发光特性进行分析.结果表明:CdS∶Y^(3+)纳米带外观形状基本规则平整且表面光滑,部分纳米带边缘会出现锯齿状;纳米带的厚度大约几十纳米,长度在几十微米到上百微米之内,宽度在5~15μm之间.纳米带具有六方结构,晶格常数a=0.414nm、c=0.671nm;纳米带的发光谱中出现多个发光峰,且各个发光峰的强度增强.

CdS ： y3＋ 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 nanobeh has a flat and smooth regu- lar surface with a width of between 5 and 15μm. 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. 414 nm and c=0. 671 nm. Photoluminescence spectra of the nanobelts revealed that the emission bands are centered at 395, 436, 467, 481, 491, 520 and 585 nm, respectively.