Thermopower and optical studies on undoped and manganese doped indium tin oxide films

Sarath Kumar Santhakumari Amma Ravindran Nair, V. Damodara Das, S. Kasiviswanathan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Thermopower measurements in the range of 300-650 K along with room temperature optical absorption and electrical resistivity studies have been performed on indium tin oxide (ITO) and manganese doped indium tin oxide (Mn:ITO) thin films grown by reactive DC sputtering. The thermopower of the films measured in Ar ambient displayed irreversible changes attributable to oxygen loss. Thermopower, carrier concentration and resistivity of the films have been found to depend on oxygen vacancies and Mn concentration. The observations have been substantiated with optical absorption and room temperature electrical resistivity results. It has also been observed that band gap tuning in these films is possible by the introduction of Mn as well as oxygen vacancies.

Original languageEnglish (US)
Pages (from-to)1390-1393
Number of pages4
JournalThin Solid Films
Volume518
Issue number5
DOIs
StatePublished - Dec 31 2009

Keywords

  • Diluted magnetic semiconductors
  • Thermopower
  • Transparent conducting oxides

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

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