Open AccessLuminescence and Structure of ZnO Grown by Physical Vapor Deposition
Author(s) -
Rafael García,
M. BarbozaFlores,
D. Berman-Mendoza,
R. Rangel-Segura,
O.E. Contreras-López
Publication year - 2012
Publication title -
advances in materials science and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 42
eISSN - 1687-8442
pISSN - 1687-8434
DOI - 10.1155/2012/872597
Subject(s) - cathodoluminescence , materials science , luminescence , wurtzite crystal structure , crystallite , chemical vapor deposition , scanning electron microscope , physical vapor deposition , analytical chemistry (journal) , optoelectronics , nanotechnology , thin film , zinc , composite material , metallurgy , chemistry , chromatography
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
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