Enhanced visible-light absorption in heavily nitrogen-doped TiO2

Q. Li, J. Xue, W. Liang, J. H. Huang, J. K. Shang

Research output: Contribution to journalArticlepeer-review

Abstract

Heavy nitrogen doping of TiO2 thin films has been achieved by ion-beam-assisted deposition. The heavily doped films have a distorted anatase crystal structure and show an increase in visible-light absorption compared to films with only light nitrogen doping. The enhanced absorption is shown by a first-principles density-functional calculation to result from an electronic band-gap narrowing, in contrast to the appearance of isolated N 2p states above the valence-band maximum that occur with light nitrogen doping.

Original languageEnglish (US)
Pages (from-to)231-238
Number of pages8
JournalPhilosophical Magazine Letters
Volume88
Issue number3
DOIs
StatePublished - Mar 2008
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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