Field-Emission Stability of Hydrothermally Synthesized Aluminum-Doped Zinc Oxide Nanostructures
| Autor: | Jyh-Liang Wang, C.C. Hwang, Tsang-Yen Hsieh, Po-Yu Yang, Der-Chi Shye |
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| Rok vydání: | 2012 |
| Předmět: |
Hot Temperature
Nanostructure Materials science Macromolecular Substances Surface Properties Annealing (metallurgy) Molecular Conformation Biomedical Engineering Analytical chemistry Nanowire Metal Nanoparticles Bioengineering Crystallinity Materials Testing Nanotechnology General Materials Science Colloids Particle Size Wurtzite crystal structure Water General Chemistry Condensed Matter Physics Anode Field electron emission Full width at half maximum Zinc Oxide Crystallization Aluminum |
| Zdroj: | Journal of Nanoscience and Nanotechnology. 12:5453-5458 |
| ISSN: | 1533-4880 |
| Popis: | The Al-doped ZnO (AZO) nanostructures field-emission arrays (FEAs) were hydrothermally synthesized on AZO/glass substrate. The samples with Al-dosage of 3 at.% show the morphology as nanowires vertically grown on the substrates and a structure of c-axis elongated single-crystalline wurtzite. The good field-emission (i.e., the large anode current and low fluctuation of 15.9%) can be found by AZO nanostructure FEAs with well-designed Al-dosage (i.e., 3 at.%) because of the vertical nanowires with the less structural defects and superior crystallinity. Moreover, the Full width at half maximum (FWHM) of near band-edge emission (NBE) decreased as the increase of annealing temperature, representing the compensated structural defects during oxygen ambient annealing. After the oxygen annealing at 500 degrees C, the hydrothermal AZO nanostructure FEAs revealed the excellent electrical characteristics (i.e., the larger anode current and uniform distribution of induced fluorescence) and enhanced field-emission stability (i.e., the lowest current fluctuation of 5.97%). |
| Databáze: | OpenAIRE |
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