化学气相沉积法制备PrB_6纳米线及场发射特性的研究

Synthesis of PrB_6 nanowires by chemical vapor deposition and their field emission properties

本文以镨(Pr)粉末和三氯化硼(BCl3)分别为镨源和硼源前驱体,通过化学气相沉积法在Si衬底上制备了大量的PrB6纳米线。利用X射线粉末衍射仪(XRD),扫描电镜(SEM),透射电镜(TEM)表征了PrB6纳米线的形貌,成份和结构进行了表征。场发射研究结果表明:PrB6纳米线具有优良的场发射性能,电场强度为13.7 eV.μm-1时,有效场发射电流约为2.98×104 A.cm-2,是一种具有广泛应用前景的冷阴极发射材料。

A simple chemical vapor deposition （CVD） method has been utilized to synthesize PrB6 nanowires using Pr powders and BCl3 gas as precursors, respectively. The morphology, component and crystal structure of the PrB6 were examined by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. The field-emission measurements show that PrB6 nanowires have good FE properties, which evidenced by high effective emission current （2.98×10^4 A·cm^-2） was achieved at 13.7 eV·μm^-1, and has extensive applications in cold cathode materials.