What is the effect of different metal dopants on the electrical properties of TiO2 nanotubes?
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The effect of different metal dopants on the electrical properties of TiO2 nanotubes is significant. Doping with elements like copper (Cu), zinc (Zn), nitrogen (N), niobium (Nb), tantalum (Ta), antimony (Sb), and zirconium (Zr) has been studied extensively. Cu doping reduces the bandgap of TiO2, enhancing charge carrier conduction at high frequencies . Nb, Ta, Sb, and Zr dopants can increase the electrical conductivity of TiO2 above 1.0×10^3 S∙cm^-1 by forming stronger covalent bonds with oxygen atoms, reducing the Schottky barrier . Additionally, the doping of transition metal oxides like MnO2, Fe2O3, and CuO in ZnO-TiO2 thin films alters the electrical characteristics, affecting activation energies and conductivity . Co-doping of Cu, Zn, and N in TiO2 increases absorption in the visible region and influences carrier kinetics and electron-hole recombination .
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| Papers (5) | Insight |
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| Metal dopants like Cu, Zn, and N in TiO2 electrodes enhance visible light absorption, create defect states, and influence charge carrier kinetics, affecting electron transport and recombination processes. | |
| Metal dopants like Nb, Ta, Sb, and Zr enhance TiO2 nanotubes' electrical conductivity above 1.0×10^3 S∙cm-1 by forming stronger covalent bonds with O atoms, reducing the Schottky barrier. | |
| Metal dopants like copper (Cu) in TiO2 nanotubes reduce bandgap, enhance charge carrier conduction, decrease charge transfer resistance, and shift dielectric relaxation from Debye to non-Debye type. | |
1 Citations | Not addressed in the paper. |
08 Jun 2022 | Metal dopants like Cu, Zn, and N in TiO2 electrodes enhance visible light absorption, create defect states, influence electron-hole recombination, and affect electron and ion transport kinetics. |
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