Enhancement of the thermoelectric performance of oxygen substituted bismuth telluride
DC Field | Value | Language |
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dc.contributor.author | Van Quang, Tran | - |
dc.contributor.author | Kim, Miyoung | - |
dc.date.available | 2021-02-22T05:32:49Z | - |
dc.date.issued | 2017-12 | - |
dc.identifier.issn | 0021-8979 | - |
dc.identifier.issn | 1089-7550 | - |
dc.identifier.uri | https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/2180 | - |
dc.description.abstract | We carried out first-principles calculations based on density functional theory and the semi-classical Boltzmann transport theory to study the effect of oxygen substitution on the electronic structure and thermoelectric properties of bismuth telluride. The newly formed compound, Bi2O2Te, is found to be a narrow bandgap semiconductor with the bandgap of E-g = 0.13 eV. The presence of a flat band close to the valence band maximum gives rise to a steep slope of density of states near Fermi energy, leading to a significant enhancement of the Seebeck coefficient. As a result, the thermoelectric power factor of Bi2O2Te is significantly improved by controlling the carrier concentration, and the maximum power factor increased with temperature. Assuming the experiment-thermal conductivity, Bi2O2Te exhibits a high figure of merit of ZT similar to 1.27 around 600K for the p-type doping, which matches or exceeds ZT of the state-of-the-art thermoelectric materials in this temperature range. This suggests that Bi2O2Te with p-type doping is a new promising material for use in the moderate-temperature thermoelectric energy conversion. Published by AIP Publishing. | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | AMER INST PHYSICS | - |
dc.title | Enhancement of the thermoelectric performance of oxygen substituted bismuth telluride | - |
dc.type | Article | - |
dc.publisher.location | 미국 | - |
dc.identifier.doi | 10.1063/1.5006233 | - |
dc.identifier.scopusid | 2-s2.0-85040101274 | - |
dc.identifier.wosid | 000418955300035 | - |
dc.identifier.bibliographicCitation | JOURNAL OF APPLIED PHYSICS, v.122, no.24 | - |
dc.citation.title | JOURNAL OF APPLIED PHYSICS | - |
dc.citation.volume | 122 | - |
dc.citation.number | 24 | - |
dc.type.docType | Article | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | sci | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.subject.keywordPlus | PLANE-WAVE METHOD | - |
dc.identifier.url | https://aip.scitation.org/doi/10.1063/1.5006233 | - |
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