Structure and photoluminescence of ZnSe nanoribbons grown by metal organic chemical vapor deposition
Structure and photoluminescence of ZnSe nanoribbons grown by metal organic chemical vapor deposition
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DOI：
10.1063/1.1695096
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发表时间：
2004-04
影响因子：
4
通讯作者：
Xitian Zhang;K. Ip;Zhiyong Liu;Y. Leung;Quan Li;S. Hark
中科院分区：
文献类型：
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作者：
Xitian Zhang;K. Ip;Zhiyong Liu;Y. Leung;Quan Li;S. Hark
以溅射镀金薄膜为催化剂，采用金属有机化学气相沉积方法在Si(100)衬底上制备了ZnSe纳米带。X射线和选区电子衍射都确定它们具有闪锌矿结构。高分辨电子显微镜研究表明，它们的结构是高度有序的，在一侧附近含有共格的孪晶片层，但基本上没有位错。在10K下的光致发光研究表明，它们的光谱以尖锐的激子峰为主，反映了它们的高纯度和近乎完美的化学计量比。在纳米带中观察到了新的激子峰，并讨论了它们的可能来源。
ZnSe nanoribbons have been synthesized using sputter-coated gold films as catalysts via metalorganic chemical vapor deposition on Si (100) substrates. Both x-ray and selected area electron diffractions determine that they have the zinc-blende structure. High-resolution transmission electron microscopic investigations show that their structure is highly ordered and contains coherent twin lamellae near one edge but is essentially free of dislocations. Photoluminescence studies at 10 K show that sharp excitonic peaks dominate their spectra, reflecting their high purity and nearly perfect stoichiometry. New excitonic peaks are observed in the nanoribbons and their possible origins are discussed.