alexa Band gap narrowing of titanium dioxide by sulfur doping.
Materials Science

Materials Science

Research & Reviews: Journal of Material Sciences

Author(s): T Umebayashi, T Yamaki, H Itoh, K Asai

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Titanium dioxide (TiO2)(TiO2)doped with sulfur (S) was synthesized by oxidationannealing of titanium disulfide (TiS2).(TiS2). According to the x-ray diffraction patterns, TiS2TiS2 turned into anatase TiO2TiO2 when annealed at 600 °C.600 °C. The residual S atoms occupied O-atom sites in TiO2TiO2 to form Ti–STi–Sbonds. The S doping caused the absorption edge of TiO2TiO2 to be shifted into the lower-energy region. Based on the theoretical analyses using ab initio band calculations, mixing of the S 3pS 3p states with the valence band was found to contribute to the band gap narrowing.

This article was published in ApplPhysLett and referenced in Research & Reviews: Journal of Material Sciences

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