Near-Band-Edge Emission of Mechanically Milled and Thermally Annealed ZnO:Ge Particles
| Autor: | Hoang Nhu Van, Cao Xuan Thang, Vu Thi Ngoc Minh, Vuong-Hung Pham, T. T. H. Tam |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Uv detector Annealing (metallurgy) 010401 analytical chemistry Analytical chemistry Mechanical milling 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Visible band 0210 nano-technology Luminescence Spectroscopy Powder mixture |
| Zdroj: | Journal of Applied Spectroscopy. 86:726-730 |
| ISSN: | 1573-8647 0021-9037 |
| Popis: | This paper reports a novel way for the synthesis of Ge-doped ZnO particles by a mechanically milled Ge and ZnO powder mixture (ZnO:Ge) followed by thermal annealing in Ar + 5%H2 to achieve near-band-edge (NBE) emission of ZnO with controllable intensities. The Ge-doped ZnO particles were synthesized by mechanical milling of a ZnO and Ge powder mixture up to 50 h in particularly, using different ZnO:Ge ratios and annealing temperatures. The Ge-doped ZnO particles were observed to have a rounded morphology with a diameter of ~500 nm when an annealing temperature of 1000°C was used. The Ge-doped ZnO particles showed NBE emission of ~380 nm with a suppressed visible band of ~500 nm as a function of the Ge content and annealing temperatures. These results suggest that the current method is very useful for synthesis of Ge-doped ZnO particles to obtain NBE emission, which is of particular importance for potential application in the optoelectronic and UV detector field. |
| Databáze: | OpenAIRE |
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