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Structural and photoluminescence properties of Co-doped ZnO nanorods prepared by RF-magnetron sputtering

机译：通过RF-磁控溅射制备的共掺杂ZnO纳米棒的结构和光致发光性能

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Cobalt-doped ZnO nanorods were successfully synthesized on SiO_2/Si substrate using RF-magnetron sputtering at room temperature. The structural, morphological, and photoluminescence (PL) properties of undoped and Co-doped ZnO nanostructure were characterized using X-ray diffraction, field emission-scanning electron microscopy, and PL analyses. The results showed that Co~(2+) replaces Zn~(2+) in the ZnO lattice without changing the wurtzite structure. As the Co concentration increases, the structure becomes highly crystalline and is gradually converted into nanorods with no extra phases. The as-synthesized nanorod arrays are dense and vertically grow on the SiO_2 substrate. The arrays exhibit diameters of approximately 56.89 nm as well as lengths that range from 247.9 nm to 527.5 nm. PL analysis reveals that the ultraviolet (UV) emission intensity decreases and exhibits a blue shift as the Co doping level is increase.
机译：在室温下使用RF-磁控溅射在SiO_2 / Si衬底上成功地合成了钴掺杂的ZnO纳米棒。采用X射线衍射，场发射扫描电子显微镜和PL分析表征了未掺杂和共掺杂ZnO纳米结构的结构，形态学和光致发光（PL）性质。结果表明，CO〜（2+）在ZnO格子中取代Zn〜（2+）而不改变紫立岩结构。随着Co浓度的增加，该结构变得高度结晶，并且逐渐转化为纳米棒，没有额外的阶段。作为合成的纳米棒阵列是致密的并且在SiO_2衬底上垂直生长。阵列的直径约为56.89nm，并且长度范围为247.9nm至527.5nm。 PL分析显示，随着CO掺杂水平增加，紫外（UV）发射强度降低并表现出蓝色变化。

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