Microstructure and optical properties of Ag-doped ZnO nanostructures prepared by a wet oxidation doping process
- 2 February 2011
- journal article
- Published by IOP Publishing in Nanotechnology
- Vol. 22 (10), 105706
- https://doi.org/10.1088/0957-4484/22/10/105706
Abstract
Silver-doped zinc oxide (Ag:ZnO) nanostructures were prepared by a facile and efficient wet oxidation method. This method included two steps: metallic Zn thin films mixed with Ag atoms were prepared by magnetron sputtering as the precursors, and then the precursors were oxidized in an O(2) atmosphere with water vapour present to form Ag:ZnO nanostructures. By controlling the oxidation conditions, pure ZnO and Ag:ZnO nanobelts/nanowires with a thickness of ∼ 20 nm and length of up to several tens of microns were synthesized. Scanning electron microscopy, transmission electron microscopy, cathodoluminescence and low temperature photoluminescence (PL) measurements were adopted to characterize the microstructure and optical properties of the prepared samples. The results indicated that Ag doping during magnetron sputtering was a feasible method to tune the optical properties of ZnO nanostructures. For the Ag:ZnO nanostructures, the intensity of ultraviolet emission was increased up to three times compared with the pure ones. The detailed PL intensity variation with the increasing temperature is also discussed based on the ionization energy of acceptor in ZnO induced by Ag dopants.Keywords
This publication has 40 references indexed in Scilit:
- Oriented ZnO nanoplates on Al substrate by solution growth techniqueJournal of Alloys and Compounds, 2009
- Preparation and enhanced photoluminescence property of ordered ZnO/TiO2 bottlebrush nanostructuresChemical Physics Letters, 2009
- Low temperature thermal oxidation synthesis of ZnO nanoneedles and the growth mechanismMaterials Chemistry and Physics, 2009
- Conversion of ZnO Nanowires into Nanotubes with Tailored DimensionsChemistry of Materials, 2008
- Well-aligned ZnO microprism arrays with umbrella-like tips: Low-temperature preparation, structure and UV photoluminescence improvementPhysica E: Low-dimensional Systems and Nanostructures, 2008
- Template Growth of ZnO Nanorods and Microrods with Controllable DensitiesCrystal Growth & Design, 2008
- ZnO – nanostructures, defects, and devicesMaterials Today, 2007
- ZnO Multipods, Submicron Wires, and Spherical Structures and Their Unique Field Emission BehaviorThe Journal of Physical Chemistry B, 2006
- Recent advances in ZnO materials and devicesMaterials Science and Engineering B, 2001
- Ab initioelectronic-structure calculations for II-VI semiconductors using self-interaction-corrected pseudopotentialsPhysical Review B, 1995