All-Oxide Thermoelectric Module with in Situ Formed Non-Rectifying Complex p–p–n Junction and Transverse Thermoelectric Effect

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dc.identifier.uri http://dx.doi.org/10.15488/4121
dc.identifier.uri https://www.repo.uni-hannover.de/handle/123456789/4155
dc.contributor.author Kanas, Nikola ger
dc.contributor.author Bittner, Michael ger
dc.contributor.author Debelo Desissa, Temesgen ger
dc.contributor.author Singh, Sathya Prakash ger
dc.contributor.author Norby, Truls ger
dc.contributor.author Feldhoff, Armin ger
dc.contributor.author Grande, Tor ger
dc.contributor.author Wiik, Kjell ger
dc.contributor.author Einarsrud, Mari-Ann ger
dc.date.accessioned 2018-12-06T14:53:08Z
dc.date.available 2018-12-06T14:53:08Z
dc.date.issued 2018
dc.identifier.citation Kanas, N. et al.: All-Oxide Thermoelectric Module with in Situ Formed Non-Rectifying Complex p–p–n Junction and Transverse Thermoelectric Effect. In: ACS Omega 3 (2018), S. 9899-9906. DOI: https://doi.org/10.1021/acsomega.8b01357 ger
dc.description.abstract All-oxide thermoelectric modules for energy harvesting are attractive because of high-temperature stability, low cost, and the potential to use nonscarce and nontoxic elements. Thermoelectric modules are mostly fabricated in the conventional π-design, associated with the challenge of unstable metallic interconnects at high temperature. Here, we report on a novel approach for fabrication of a thermoelectric module with an in situ formed p–p–n junction made of state-of-the-art oxides Ca3Co4–xO9+δ (p-type) and CaMnO3–CaMn2O4 composite (n-type). The module was fabricated by spark plasma co-sintering of p- and n-type powders partly separated by insulating LaAlO3. Where the n- and p-type materials originally were in contact, a layer of p-type Ca3CoMnO6 was formed in situ. The hence formed p–p–n junction exhibited Ohmic behavior and a transverse thermoelectric effect, boosting the open-circuit voltage of the module. The performance of the module was characterized at 700–900 °C, with the highest power output of 5.7 mW (around 23 mW/cm2) at 900 °C and a temperature difference of 160 K. The thermoelectric properties of the p- and n-type materials were measured in the temperature range 100–900 °C, where the highest zT of 0.39 and 0.05 were obtained at 700 and 800 °C, respectively, for Ca3Co4–xO9+δ and the CaMnO3–CaMn2O4 composite. ger
dc.language.iso eng ger
dc.publisher Washington D.C. : American Chemical Society
dc.relation.ispartofseries ACS Omega 3 (2018) ger
dc.rights ACS AuthorChoice License ger
dc.rights.uri https://pubs.acs.org/page/policy/authorchoice_termsofuse.html
dc.subject Electrochemistry eng
dc.subject Materials science eng
dc.subject Piezoelectricity and Thermoelectricity eng
dc.subject Semiconductors eng
dc.subject.ddc 540 | Chemie ger
dc.title All-Oxide Thermoelectric Module with in Situ Formed Non-Rectifying Complex p–p–n Junction and Transverse Thermoelectric Effect ger
dc.type article ger
dc.type Text ger
dc.relation.doi 10.1021/acsomega.8b01357
dc.description.version publishedVersion ger


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