CdS:Y3+纳米带的制备及其光致发光特性

Synthesis and photoluminescence properties of CdS:Y3+ nanobelts

摘要:

采用热蒸发法制备CdS:Y3+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:Y3+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，宽度在五到十五微米之间。纳米带具有六方结构，晶格常数a = 0.414 nm、c = 0.671 nm；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。

Abstract:

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 nanobelt has a flat and smooth regular surface with a width of between 5 and 15 micrometers. 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 emission bands centered at 395、436、467、481、491、520 and 585 nm respectively.