Electrical and structural characterization of as-grown and annealed hydrothermal bulk ZnO
| Autor: | G. H. Kassier, M. Mamor, M. Hayes, Khalid Bouziane, F.D. Auret |
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| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | Journal of Applied Physics. 102:014903 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.2751413 |
| Popis: | Hall effect measurements in the range 20–370 K on as-grown and annealed hydrothermal bulk ZnO have been performed. The bulk conductivity in the highly resistive as-grown sample was found to decrease and then increase after annealing at 550 °C and 930 °C, respectively. The conduction in the as-grown material is attributed to a deep donor which is replaced by a much shallower donor after annealing at 930 °C. Annealing at both temperatures also produced strong surface conduction effects. Nondegenerate low-mobility surface conduction dominated the electrical properties of the sample annealed at 550 °C, while a degenerate surface channel was formed after annealing at 930 °C. In addition, Rutherford backscattering and channeling spectrometry (RBS/C) was used to assess the effect of annealing on the crystalline quality of the samples. RBS/C measurements reveal that annealing at 930 °C leads to significant improvement of the crystalline quality of the material, while annealing at 550 °C results in the segregation... |
| Databáze: | OpenAIRE |
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