Diffusionskonstante und charakteristische Absorption vor der Bandkante von Mn in ZnO-Kristallen |
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Authors: | F W Kleinlein R Helbig |
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Institution: | 1. Institut für Angewandte Physik, Erlangen
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Abstract: | ZnO single crystals were doped with Mn and Co by diffusion. In the temperature range from 1400–1600 K the Mn and Co-diffusion-constants were determined:D Mn=3.2 · 10?3 exp (?2.87 eV/kT) cm2 sec?1 andD Co=1·10exp(?3.98 eV/kT) cm2 sec?1. The Mn doped ZnO crystals show a characteristic colour due to an absorption near the intrinsic absorption edge. The corresponding absorption spectra were measured forE⊥c andE∥c. A discussion of different absorption mechanism shows that a charge-transfer transition is responsible for this absorption. |
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