气相控制剂对CdTe薄膜物理性能的影响
The vapor controller effect on physical properties of CdTe thin films
摘要:
本文报道了用一种新的真空气相控制系统制备的400 nm碲化镉纳米晶薄膜的光学和结构特性。该系统实际上是一个旋转的圆筒,在涂覆过程中放置在材料蒸汽路径中。在筒体的上截面上开有供蒸汽通过的弧形槽。在不同的蒸汽控制条件下制备三种类型的样品,即:没有控制器系统(常规方法)、具有旋转圆筒和仅具有圆筒的上部截面(其充当旋转快门)。采用X射线衍射(XRD)、场发射扫描电子显微镜(FESEM)和紫外-可见光谱(UV-Vis)等技术对样品进行了表征。结果表明,该技术不仅改善了样品的结构性能,而且改变了样品的带隙。
英文摘要:
This paper reports the optical and structural properties of 400 nm nanocrystalline cadmium telluride thin films fabricated using a new vapor controller system in vacuum. This system is indeed a rotating cylinder placed in the material steam path during coating process. The upper cross section of the cylinder has one arc groove allowing the steam to pass through. Three type samples were made under different vapor controlling conditions namely; without controller system (conventional method), with rotating cylinder, and with upper cross section of the cylinder alone which acts as a rotating shutter. The prepared samples have been studied by X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM) and UV-Vis Spectroscopy techniques. The results show, not only the structural properties were improved by this technique but also the band gap of samples were changed.
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