dc.contributor.author | Gunnæs, Anette Eleonora | |
dc.contributor.author | Tofan, Raluca | |
dc.contributor.author | Berland, Kristian | |
dc.contributor.author | Gorantla, Sandeep Madhukar | |
dc.contributor.author | Storaas, Thomas Aarflot | |
dc.contributor.author | Desissa, Temesgen Debelo | |
dc.contributor.author | Schrade, Matthias | |
dc.contributor.author | Persson, Clas | |
dc.contributor.author | Einarsrud, Mari-Ann | |
dc.contributor.author | Wiik, Kjell | |
dc.contributor.author | Norby, Truls Eivind | |
dc.contributor.author | Kanas, Nikola | |
dc.date.accessioned | 2020-09-14T09:20:42Z | |
dc.date.available | 2020-09-14T09:20:42Z | |
dc.date.created | 2020-05-12T16:17:37Z | |
dc.date.issued | 2020 | |
dc.identifier.citation | RSC Advances. 2020, 10 (9), 5026-5031. | en_US |
dc.identifier.issn | 2046-2069 | |
dc.identifier.uri | https://hdl.handle.net/11250/2677595 | |
dc.description.abstract | An all-oxide thermoelectric generator for high-temperature operation depends on a low electrical resistance of the direct p–n junction. Ca3Co4−xO9+δ and CaMnO3−δ exhibit p-type and n-type electronic conductivity, respectively, and the interface between these compounds is the material system investigated here. The effect of heat treatment (at 900 °C for 10 h in air) on the phase and element distribution within this p–n junction was characterized using advanced transmission electron microscopy combined with X-ray diffraction. The heat treatment resulted in counter diffusion of Ca, Mn and Co cations across the junction, and subsequent formation of a Ca3Co1+yMn1−yO6 interlayer, in addition to precipitation of Co-oxide, and accompanying diffusion and redistribution of Ca across the junction. The Co/Mn ratio in Ca3Co1+yMn1−yO6 varies and is close to 1 (y = 0) at the Ca3Co1+yMn1−yO6–CaMnO3−δ boundary. The existence of a wide homogeneity range of 0 ≤ y ≤ 1 for Ca3Co1+yMn1−yO6 is corroborated with density functional theory (DFT) calculations showing a small negative mixing energy in the whole range. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Royal Society of Chemistry | en_US |
dc.rights | Navngivelse-Ikkekommersiell 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc/4.0/deed.no | * |
dc.title | Chemical stability of Ca3Co4−xO9+δ/CaMnO3−δ p–n junction for oxide-based thermoelectric generators | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.source.pagenumber | 5026-5031 | en_US |
dc.source.volume | 10 | en_US |
dc.source.journal | RSC Advances | en_US |
dc.source.issue | 9 | en_US |
dc.identifier.doi | 10.1039/c9ra07159h | |
dc.identifier.cristin | 1810601 | |
dc.relation.project | Norges forskningsråd: 228854 | en_US |
dc.description.localcode | Open Access Article. This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |