Characterization of ZnMgO hexagonal-nanotowers/films on m-plane sapphire synthesized by metal organic chemical vapour deposition
Characterization of ZnMgO hexagonal-nanotowers/films on m-plane sapphire synthesized by metal organic chemical vapour deposition
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DOI：
10.1088/0022-3727/41/20/205416
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发表时间：
2008-10
期刊：
影响因子：
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通讯作者：
A. Yang;H. Wei;X. Liu;H. Song;H. Fan;P. F. Zhang;G. Zheng;S. Yang;Q. Zhu;Z. Wang
中科院分区：
文献类型：
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作者：
A. Yang;H. Wei;X. Liu;H. Song;H. Fan;P. F. Zhang;G. Zheng;S. Yang;Q. Zhu;Z. Wang
采用垂直低压金属有机化学气相沉积系统在m面蓝宝石衬底上成功制备了ZnMgO六角纳米塔/薄膜。使用各种技术对所得产物的结构和光学性质进行了表征。它们是沿着非极性方向生长的，具有纤锌矿结构。ZnMgO六边形纳米塔的底部直径约为200 nm，长度为120 nm。光致发光和拉曼光谱表明，产物具有较好的晶体质量，氧空位较少。随着Mg的掺入，多声子散射变得弱而宽，所有观察到的振动模式的强度降低。紫外近带边发射显示出明显的蓝移（高达100 meV）和加宽相比，纯ZnO产品。
ZnMgO hexagonal-nanotowers/films grown on m-plane sapphire substrates were successfully synthesized using a vertical low-pressure metal organic chemical vapour deposition system. The structural and optical properties of the as-obtained products were characterized using various techniques. They were grown along the non-polar direction and possessed wurtzite structure. The ZnMgO hexagonal-nanotowers were about 200 nm in diameter at the bottom and 120 nm in length. Photoluminescence and Raman spectra show that the products have good crystal quality with few oxygen vacancies. With Mg incorporation, multiple-phonon scattering becomes weak and broad, and the intensities of all observed vibrational modes decrease. The ultraviolet near band edge emission shows a clear blueshift (as much as 100 meV) and broadening compared with that of pure ZnO products.