Abstract
Mn-doped ZnO nanowires have been fabricated through high-temperature vapor-solid deposition process. The temperature-dependent photoluminescence properties of Mn-doped ZnO nanowires under 10 to 300 K have been investigated. The results show that the prepared samples have intensive multipeak emissions in the ultraviolet (UV) region (about 3.4–3.0 eV) at low temperature. The analyses of Gaussian-fitted the UV band from 10 to 300 K reveal that all UV spectra can be well fitted by four Gaussian peaks. With increasing temperature, the four UV bands show different temperature dependences and have obvious redshift. The origins of the intensive UV multipeak emissions can be attributed to the excitonic transition in Mn-doped ZnO nanowires under low temperature. The analysis results indicate that the crystal quality and UV luminescence efficiency of ZnO nanowires are improved with Mn doping.
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