Abstract
AbstractNb-doped anatase TiO2 films were deposited on unheated glass by dc magnetron sputtering using a slightly reduced TiO2-x–Nb2O5-x target with oxygen flow ratios [O2/(Ar+O2)] in the range from 0.00 to 0.20%. After post-annealing in a vacuum (6 × 10−4 Pa) at 500 and 600 °C for 1 h, the films were crystallized into the polycrystalline anatase TiO2 structure. The resistivity of the both films decreased to 6.3-6.8 × 10−4 Ω·cm with increasing [O2/(Ar+O2)] to 0.10%, where the carrier density and Hall mobility were 1.9-2.0 × 1021 cm−3 and 4.9-5.0 cm2·V−1·s−1, respectively. The films exhibited high transparency of over 60-70% in the visible region of light.
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