Luminescence and Structure of ZnO Grown by Physical Vapor Deposition
| Autor: | R. García-Gutiérrez, M. Barboza-Flores, D. Berman-Mendoza, R. Rangel-Segura, O. E. Contreras-López |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | Advances in Materials Science and Engineering, Vol 2012 (2012) |
| Druh dokumentu: | article |
| ISSN: | 1687-8434 1687-8442 |
| DOI: | 10.1155/2012/872597 |
| Popis: | Nanostructured ZnO was deposited on different substrates (Si, SiO2, and Au/SiO2) by an enhanced physical vapor deposition technique that presents excellent luminescent properties. This technique consists in a horizontal quartz tube reactor that uses ultra-high purity Zn and UHP oxygen as precursors. The morphology and structure of ZnO grown in this work were studied by electron microscopy and X-ray diffraction. The XRD patterns revealed the highly crystalline phase of wurtzite polycrystalline structure, with a preferred (1011) growth direction. Room temperature cathodoluminescence studies revealed two features in the luminescence properties of the ZnO obtained by this technique, first a high-intensity narrow peak centered at 390 nm (~3.2 eV) corresponding to a near band-to-band emission, and secondly, a broad peak centered around 517 nm (2.4 eV), the typical green-yellow luminescence, related to an unintentionally doped ZnO. |
| Databáze: | Directory of Open Access Journals |
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