dc.contributor.author | Desissa, Temesgen D. | |
dc.contributor.author | Haugsrud, Reidar | |
dc.contributor.author | Wiik, Kjell | |
dc.contributor.author | Norby, Truls Eivind | |
dc.date.accessioned | 2019-03-22T08:26:56Z | |
dc.date.available | 2019-03-22T08:26:56Z | |
dc.date.created | 2018-03-14T09:52:53Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Solid State Ionics. 2018, 320 215-220. | nb_NO |
dc.identifier.issn | 0167-2738 | |
dc.identifier.uri | http://hdl.handle.net/11250/2591214 | |
dc.description.abstract | We herein report inter-diffusion across the interface between p-type Ni0.98Li0.02O and n-type Zn0.98Al0.02O for various applications including p-n-heterojunction diodes and oxide thermoelectrics. Diffusion couples were made of polished surfaces of ceramic samples pre-sintered at 1250 and 1350 °C for Ni0.98Li0.02O and Zn0.98Al0.02O, respectively. The inter-diffusion couples were annealed at 900–1200 °C for 160 h in ambient air. Electron Probe Micro Analysis (EPMA) was used to acquire diffusion profiles, followed by fitting to Fick's second law and Whipple–Le Claire's models for bulk and grain-boundary diffusion calculation, respectively. Zn2+ diffused into Ni0.98Li0.02O mainly by bulk diffusion with an activation energy of 250 ± 10 kJ/mol, whereas Ni2+ diffused into Zn0.98Al0.02O by both bulk and enhanced grain boundary diffusion with activation energies of 320 ± 120 kJ/mol and 245 ± 50 kJ/mol, respectively. The amount of Al3+ diffused from the Al-doped ZnO into the NiO phase was too small for a corresponding diffusion coefficient to be calculated. Li-ion distribution and diffusivity were not determined due to lack of analyzer sensitivity for Li. The bulk and effective diffusivities of Zn2+ and Ni2+ into NiO and ZnO enable prediction of inter-diffusion lengths as a function of time and temperature, allowing estimates of device performance, stability, and lifetimes at different operation temperatures. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | Elsevier | nb_NO |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no | * |
dc.title | Inter-diffusion across a direct p-n heterojunction of Li-doped NiO and Al-doped ZnO | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | acceptedVersion | nb_NO |
dc.source.pagenumber | 215-220 | nb_NO |
dc.source.volume | 320 | nb_NO |
dc.source.journal | Solid State Ionics | nb_NO |
dc.identifier.doi | 10.1016/j.ssi.2018.03.011 | |
dc.identifier.cristin | 1572708 | |
dc.relation.project | Norges forskningsråd: 228854 | nb_NO |
dc.description.localcode | © 2018. This is the authors’ accepted and refereed manuscript to the article. Locked until 13.3.2020 due to copyright restrictions. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | nb_NO |
cristin.unitcode | 194,66,35,0 | |
cristin.unitname | Institutt for materialteknologi | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 1 | |