Abstract

Sulfur-doped titanium dioxide (TiO2) films have been deposited on α-Al2O3(0001) and Si(100) substrates by pulsed laser deposition (PLD). To investigate growth condition of sulfur-doped TiO2 films, the various concentration of sulfur in titanium dioxide targets was prepared by annealing titanium disulfide (TiS2) in air up to 400°C. The crystal structure of films and the concentration of doped sulfur were assessed by X-ray diffraction (XRD) and Rutherford backscattering spectroscopy with channeling (RBS/C). It was found that the concentration of sulfur in rutile TiO2 films was mainly influenced by the substrate temperature. Rutile TiO2(100) films contained a few atomic percent sulfur were obtained on α-Al2O3(0001) at 400°C substrate temperature using an annealed titanium disulfide target. RBS/C analysis showed that doped sulfur atoms in rutile TiO2(100) films were distributed randomly.

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