liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • 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
Nanoporous Ca3Co4O9 Thin Films for Transferable Thermoelectrics
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Nanostructured Materials. Linköping University, Faculty of Science & Engineering.
Materials Science Centre, Indian Institute of Technology, Kharagpur 721302, India.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
Show others and affiliations
2018 (English)In: ACS applied energy materials, ISSN 2574-0962, Vol. 1, no 5, p. 2261-2268Article in journal (Refereed) Published
Abstract [en]

The development of high-performance and transferable thin-film thermoelectric materials is important for low-power applications, e.g., to power wearable electronics, and for on-chip cooling. Nanoporous films offer an opportunity to improve thermoelectric performance by selectively scattering phonons without affecting electronic transport. Here, we report the growth of nanoporous Ca3Co4O9 thin films by a sequential sputtering-annealing method. Ca3Co4O9 is promising for its high Seebeck coefficient and good electrical conductivity and important for its nontoxicity, low cost, and abundance of its constituent raw materials. To grow nanoporous films, multilayered CaO/CoO films were deposited on sapphire and mica substrates by rf-magnetron reactive sputtering from elemental Ca and Co targets, followed by annealing at 700 C to form the final phase of Ca3Co4O9. This phase transformation is accompanied by a volume contraction causing formation of nanopores in the film. The thermoelectric propoperties of the nanoporous Ca3Co4O9 films can be altered by controlling the porosity. The lowest electrical resistivity is ~7 mO cm, yielding a power factor of 2.32 × 10-4 Wm-1K-2 near room temperature. Furthermore, the films are transferable from the primary mica substrates to other arbitrary polymer platforms by simple dry transfer, which opens an opportunity of low-temperature use these materials.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2018. Vol. 1, no 5, p. 2261-2268
Keywords [en]
Ca3Co4O9; nanoporous; thermoelectrics; thin film; transferable
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-155845DOI: 10.1021/acsaem.8b00333ISI: 000458705500058PubMedID: 29905306OAI: oai:DiVA.org:liu-155845DiVA, id: diva2:1300702
Available from: 2019-03-29 Created: 2019-03-29 Last updated: 2019-04-04Bibliographically approved

Open Access in DiVA

fulltext(10280 kB)47 downloads
File information
File name FULLTEXT01.pdfFile size 10280 kBChecksum SHA-512
b7029a242c1350ff21b8ae70985555db6e203896a19fb3b57119703a7a6694761fb44ca11a5e6bb994370d202d4380e1757f1c63708154e713a83551ac0884b2
Type fulltextMimetype application/pdf

Other links

Publisher's full textPubMed

Authority records BETA

Paul, BiplabBjörk, Emma M.Lu, JunEklund, Per

Search in DiVA

By author/editor
Paul, BiplabBjörk, Emma M.Lu, JunEklund, Per
By organisation
Thin Film PhysicsFaculty of Science & EngineeringNanostructured Materials
Inorganic Chemistry

Search outside of DiVA

GoogleGoogle Scholar
Total: 47 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
pubmed
urn-nbn

Altmetric score

doi
pubmed
urn-nbn
Total: 67 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • 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