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Optical and electric properties of Nb-doped anatase TiO2 single crystal |
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| Authors: | Deependra Das Mulmi Nozomi Kamiya Yutaka Murakami |
| Affiliation: | a Department of Physics, Faculty of Engineering, Yokohama National University, Tokiwadai 79-5, Hodogaya, Yokohama 240-8501, Japan b Nanoarchitechtonics Research Center, AIST, Higashi 1-1-1, Tsukuba, Ibaragi 305-8500, Japan |
| Abstract: | Nb-doped anatase TiO2 single crystal has been grown by chemical vapour transport method. Raman spectra shows that the obtained crystal with Nb of 0.08 wt% has typical anatase structure. An absorption band was observed at around 2.2 eV, which seems to be due to the d-d transition in the conduction band. The electron paramagnetic resonance and electric resistivity measurements show that the doped niobium makes quite shallow donor level whose orbital is dxy-like centered at the titanium position of anatase. |
| Keywords: | A. Oxides B. Crystal growth D. Electrical properties D. Optical properties |
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