Band gap narrowing of titanium dioxide by sulfur doping

T. Umebayashi; T. Yamaki; H. Itoh; K. Asai

doi:10.1063/1.1493647

Band gap narrowing of titanium dioxide by sulfur doping

T. Umebayashi, T. Yamaki, H. Itoh, K. Asai

Research output: Contribution to journal › Article › peer-review

1415 Citations (Scopus)

Abstract

Titanium dioxide (TiO₂) doped with sulfur (S) was synthesized by oxidation annealing of titanium disulfide (TiS₂). According to the x-ray diffraction patterns, TiS₂ turned into anatase TiO₂ when annealed at 600°C. The residual S atoms occupied O-atom sites in TiO₂ to form TiS bonds. The S doping caused the absorption edge of TiO₂ to be shifted into the lower-energy region. Based on the theoretical analyses using ab initio band calculations, mixing of the S3p states with the valence band was found to contribute to the band gap narrowing.

Original language	English
Pages (from-to)	454-456
Number of pages	3
Journal	Applied Physics Letters
Volume	81
Issue number	3
DOIs	https://doi.org/10.1063/1.1493647
Publication status	Published - 2002 Jul 15
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.1493647

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title = "Band gap narrowing of titanium dioxide by sulfur doping",

abstract = "Titanium dioxide (TiO2) doped with sulfur (S) was synthesized by oxidation annealing of titanium disulfide (TiS2). According to the x-ray diffraction patterns, TiS2 turned into anatase TiO2 when annealed at 600°C. The residual S atoms occupied O-atom sites in TiO2 to form TiS bonds. The S doping caused the absorption edge of TiO2 to be shifted into the lower-energy region. Based on the theoretical analyses using ab initio band calculations, mixing of the S3p states with the valence band was found to contribute to the band gap narrowing.",

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AU - Yamaki, T.

AU - Itoh, H.

AU - Asai, K.

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Y1 - 2002/7/15

N2 - Titanium dioxide (TiO2) doped with sulfur (S) was synthesized by oxidation annealing of titanium disulfide (TiS2). According to the x-ray diffraction patterns, TiS2 turned into anatase TiO2 when annealed at 600°C. The residual S atoms occupied O-atom sites in TiO2 to form TiS bonds. The S doping caused the absorption edge of TiO2 to be shifted into the lower-energy region. Based on the theoretical analyses using ab initio band calculations, mixing of the S3p states with the valence band was found to contribute to the band gap narrowing.

AB - Titanium dioxide (TiO2) doped with sulfur (S) was synthesized by oxidation annealing of titanium disulfide (TiS2). According to the x-ray diffraction patterns, TiS2 turned into anatase TiO2 when annealed at 600°C. The residual S atoms occupied O-atom sites in TiO2 to form TiS bonds. The S doping caused the absorption edge of TiO2 to be shifted into the lower-energy region. Based on the theoretical analyses using ab initio band calculations, mixing of the S3p states with the valence band was found to contribute to the band gap narrowing.

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Band gap narrowing of titanium dioxide by sulfur doping

Abstract

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