Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Determination of electronic structure by impedance spectroscopy
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.ORCID iD: 0000-0002-8279-5163
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Structural Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
2010 (English)In: Journal of Non-Crystalline Solids, ISSN 0022-3093, E-ISSN 1873-4812, Vol. 356, no 11-17, p. 705-709Article in journal (Refereed) Published
Abstract [en]

We present a novel method, based on electrochemical intercalation and impedance spectroscopy, to determine the electronic density of states of disordered transition metal oxides. Specifically, we have determined the "electrochemical density of states" of tungsten and iridium oxide thin films over energy ranges as wide as 1-2 eV. Our experimental results show a number of qualitative features exhibited by state-of-the-art band structure computations. Differences in details are probably due to the disordered, porous and sometimes amorphous nature of our films. The results suggest that the impedance spectroscopy method can be used to obtain the density of states only if the conduction band states are localized. The electrochemical density of states is often smaller than the computed one due to kinetic effects, i.e. very slow relaxations of the charge carriers. Nevertheless, our sensitive method opens new vistas for studying the electronic structure of disordered materials.

Place, publisher, year, edition, pages
2010. Vol. 356, no 11-17, p. 705-709
Keyword [en]
Electrochemical properties, Band structure, Dielectric properties, Relaxation, Electric modulus
National Category
Physical Sciences Engineering and Technology
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
URN: urn:nbn:se:uu:diva-137452DOI: 10.1016/j.jnoncrysol.2009.06.053ISI: 000276665500037OAI: oai:DiVA.org:uu-137452DiVA: diva2:378516
Available from: 2011-09-21 Created: 2010-12-15 Last updated: 2017-12-11Bibliographically approved

Open Access in DiVA

fulltext(318 kB)468 downloads
File information
File name FULLTEXT02.pdfFile size 318 kBChecksum SHA-512
e4c6362b546c38678aab111faa424cdb2fc356a90af8440b1e937174e1bd6bc8148d04bfa0c908d2d83f2115ef396a65765a8f63af4d0d5fb227a2e4c0d6c7cf
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Niklasson, Gunnar A.Malmgren, SaraGreen, Sara
By organisation
Solid State PhysicsStructural Chemistry
In the same journal
Journal of Non-Crystalline Solids
Physical SciencesEngineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 468 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 903 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf