A transparent metal: Nb-doped anatase TiO2.

This Letter focuses on the discovery of a transparent conducting oxide (TCO), anatase Ti1-xNbxO2 films with x=0.002–0.2. The resistivity of films with x>=0.03 is 2–3×10-4 Ω cm at room temperature. The carrier density of Ti1-xNbxO2 can be controlled in a range of 1×1019 to 2×1021 cm-3. The internal transmittance for films with x≤=0.03 (40 nm thickness) is about 97% in the visible light region. The transport and optical parameters are comparable to those of typical TCOs, such as In2-xSnxO3 and ZnO [ABSTRACT FROM AUTHOR]