Preparation and photoluminescence of ZnO with nanostructure by hollow-cathode discharge |
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Authors: | Xin-chao BIAN Chun-qing HUO Yue-fei ZHANG Qiang CHEN |
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Affiliation: | (1) Plasma Physical and Material Laboratory, Laboratory of Printing & Packaging Material and Technology Beijing Area Key Laboratory, Beijing Institute of Graphic Communication, Beijing, 102600, China |
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Abstract: | Without the use of a metal catalyst in the process, ZnO with nanostructures was successfully prepared on Si (100) substrate
by simple chemical vapor-deposition method. In our work, Ar was used as the plasma forming gas, O2 was the reactive gas and metal zinc powder (99.99% purity) vaporized by cylinder hollow-cathode discharge (HCD) acted as
the zinc source. The crystal structures of the as-synthesized ZnO nanostructures were characterized by X-ray diffraction (XRD);
the ZnO sample growing on the wall of the crucible showed a ‘comb-like’ nanostructure, while the other one at the bottom of
the crucible showed a ‘rod-like’ structure, which can be attributed to the difference of the oxygen content. The measurement
on the photoluminescence (PL) performance of the ZnO nanostructures was carried out at room temperature. The results indicated
that the ‘comb-shape’ ZnO nanomaterial possessed a remarkably strong ultraviolet emission peak centered at 388 nm, while ZnO
nanorods, except better ultraviolet emission, also had relatively strong blue-green emission ranging from 470 to 600 nm due
to the existence of oxygen vacancies. The growth mechanism of ZnO with nanostructures is also discussed in this paper. |
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Keywords: | cylinder hollow-cathode discharge (HCD) ZnO with nanostructure chemical vapor-deposition method |
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