Thin porous indium tin oxide nanoparticle films: Effects of annealing in vacuum and air

J. Ederth, A. Hultåker, G. A. Niklasson, P. Heszler, A. R. Van Doorn, M. J. Jongerius, D. Burgard, C. G. Granqvist

Research output: Contribution to journalArticle

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Abstract

Electrical and optical properties were investigated in porous thin films consisting of In2O3:Sn (indium tin oxide; ITO) nanoparticles. The temperature-dependent resistivity was successfully described by a fluctuation-induced tunneling model, indicating a sample morphology dominated by clusters of ITO nanoparticles separated by insulating barriers. An effective-medium model, including the effect of ionized impurity scattering, was successfully fitted to measured reflectance and transmittance. Post-deposition treatments were carried out at 773 K for 2 h in both air and vacuum. It is shown that vacuum annealing increases either the barrier width or the area between two conducting clusters in the samples and, furthermore, an extra optical absorption occurs close to the band gap. A subsequent air annealing then reduces the effect of the barriers on the electrical properties and diminishes the absorption close to the band gap.

Original languageEnglish
Pages (from-to)1363-1368
Number of pages6
JournalApplied Physics A: Materials Science and Processing
Volume81
Issue number7
DOIs
Publication statusPublished - Nov 2005

Fingerprint

Tin oxides
indium oxides
Indium
tin oxides
Electric properties
Energy gap
Vacuum
Annealing
Nanoparticles
ITO (semiconductors)
nanoparticles
vacuum
annealing
air
Air
electrical properties
Light absorption
Optical properties
Scattering
Impurities

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Ederth, J., Hultåker, A., Niklasson, G. A., Heszler, P., Van Doorn, A. R., Jongerius, M. J., ... Granqvist, C. G. (2005). Thin porous indium tin oxide nanoparticle films: Effects of annealing in vacuum and air. Applied Physics A: Materials Science and Processing, 81(7), 1363-1368. https://doi.org/10.1007/s00339-005-3264-7

Thin porous indium tin oxide nanoparticle films : Effects of annealing in vacuum and air. / Ederth, J.; Hultåker, A.; Niklasson, G. A.; Heszler, P.; Van Doorn, A. R.; Jongerius, M. J.; Burgard, D.; Granqvist, C. G.

In: Applied Physics A: Materials Science and Processing, Vol. 81, No. 7, 11.2005, p. 1363-1368.

Research output: Contribution to journalArticle

Ederth, J, Hultåker, A, Niklasson, GA, Heszler, P, Van Doorn, AR, Jongerius, MJ, Burgard, D & Granqvist, CG 2005, 'Thin porous indium tin oxide nanoparticle films: Effects of annealing in vacuum and air', Applied Physics A: Materials Science and Processing, vol. 81, no. 7, pp. 1363-1368. https://doi.org/10.1007/s00339-005-3264-7
Ederth, J. ; Hultåker, A. ; Niklasson, G. A. ; Heszler, P. ; Van Doorn, A. R. ; Jongerius, M. J. ; Burgard, D. ; Granqvist, C. G. / Thin porous indium tin oxide nanoparticle films : Effects of annealing in vacuum and air. In: Applied Physics A: Materials Science and Processing. 2005 ; Vol. 81, No. 7. pp. 1363-1368.
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