Hide metadata

dc.date.accessioned2021-04-13T07:43:11Z
dc.date.available2021-04-13T07:43:11Z
dc.date.created2015-10-12T15:12:53Z
dc.date.issued2016
dc.identifier.citationSchrade, Matthias Magraso, Anna Galeckas, Augustinas Finstad, Terje Norby, Truls . The Band Gap of BaPrO3 Studied by Optical and Electrical Methods. Journal of The American Ceramic Society. 2016, 99(2), 492-498
dc.identifier.urihttp://hdl.handle.net/10852/85214
dc.description.abstractWe report on measurements of the electrical and optical properties of BaPrO3. The temperature dependences of the electrical conductivity σ and the Seebeck coefficient α of polycrystalline samples were studied over a wide temperature range (300°C–1050°C). At lower temperatures, the observed charge transport can be described as thermally activated hopping of electron‐based small polarons with an activation energy of 0.37 eV. An observed change in temperature dependence of both σ and α around 700°C was observed and interpreted as a transition from extrinsic to intrinsic carrier transport. The intrinsic conduction can be modeled with an apparent electrical band gap of ~2 eV. Optical absorption and emission spectroscopy in the UV–VIS–NIR range revealed a series of characteristic absorption thresholds and the type of optical transitions was identified by combining transmittance and diffuse‐reflectance spectroscopy methods. An absorption edge of indirect type with onset at 0.6 eV is attributed to small polaron effects. The higher lying absorption thresholds of direct origin positioned at around 1.8 and 3.8 eV are correlated with thermal activation parameters from electrical measurements and discussed in terms of the band gap of BaPrO3.
dc.languageEN
dc.titleThe Band Gap of BaPrO3 Studied by Optical and Electrical Methods
dc.typeJournal article
dc.creator.authorSchrade, Matthias
dc.creator.authorMagraso, Anna
dc.creator.authorGaleckas, Augustinas
dc.creator.authorFinstad, Terje
dc.creator.authorNorby, Truls
cristin.unitcode185,15,12,0
cristin.unitnameKjemisk institutt
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2
dc.identifier.cristin1280080
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of The American Ceramic Society&rft.volume=99&rft.spage=492&rft.date=2016
dc.identifier.jtitleJournal of The American Ceramic Society
dc.identifier.volume99
dc.identifier.issue2
dc.identifier.startpage492
dc.identifier.endpage498
dc.identifier.doihttps://doi.org/10.1111/jace.13961
dc.identifier.urnURN:NBN:no-87829
dc.type.documentTidsskriftartikkel
dc.type.peerreviewedPeer reviewed
dc.source.issn0002-7820
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/85214/2/BaPrO3_PostPrint.pdf
dc.type.versionAcceptedVersion
dc.relation.projectNFR/200022


Files in this item

Appears in the following Collection

Hide metadata