Thermoelectric properties of nano-bulk bismuth telluride prepared with spark plasma sintered nano-plates
DC Field | Value | Language |
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dc.contributor.author | Ahn, Kyunghan | - |
dc.contributor.author | Won, Jong Kook | - |
dc.contributor.author | Kang, Yeo Kyung | - |
dc.contributor.author | Hwang, Chahwan | - |
dc.contributor.author | Chung, In | - |
dc.contributor.author | Kim, Myung-Gil | - |
dc.date.available | 2019-05-28T01:38:39Z | - |
dc.date.issued | 2019-02 | - |
dc.identifier.issn | 1567-1739 | - |
dc.identifier.issn | 1878-1675 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/18261 | - |
dc.description.abstract | The pursuit for a high-performance thermoelectric n-type bismuth telluride-based material is significant because n-type materials are inferior to their corresponding p-type materials in highly efficient thermoelectric modules. Herein, to improve the thermoelectric performance of an n-type Bi2Te3, we prepared Bi2Te3 nano-plates with a homogeneous sub-micron size distribution and thickness range of about a few tens of nanometers. This was achieved using a typical nano-chemical synthetic method, and the prepared materials were then spark plasma sintered to fabricate n-type nano-bulk Bi2Te3 samples. We observed a significant enhancement of the anisotropic electrical transport properties for the nano-bulk sample with a higher power factor along the in-plane direction (24.3 mu W cm(-1) K-2 at 300 K) than that along the out-of-plane direction (8.1 mu W cm(-1) K-2 at 300 K). However, thermal transport properties were insensitive along the measured direction for the nano-bulk sample. We used a dimensionless figure of merit ZT to calculate the thermoelectric performance. The results showed that the maximum ZT value of 0.69 was achieved along the in-plane direction at 440 K for the nano-bulk n-type Bi2Te3 sample, which was however smaller than that of the previously reported n-type samples (ZT of 1.1). We believe that a further enhancement of the ZT value in the fabricated nano-bulk sample could be accomplished by effectively removing the surface organic ligand of the Bi2Te3 nano-plate particles and optimizing the spark plasma sintering conditions, maintaining the nano-plate morphology intact. | - |
dc.format.extent | 5 | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.title | Thermoelectric properties of nano-bulk bismuth telluride prepared with spark plasma sintered nano-plates | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.cap.2018.11.010 | - |
dc.identifier.bibliographicCitation | CURRENT APPLIED PHYSICS, v.19, no.2, pp 97 - 101 | - |
dc.identifier.kciid | ART002437735 | - |
dc.description.isOpenAccess | N | - |
dc.identifier.wosid | 000456023200005 | - |
dc.identifier.scopusid | 2-s2.0-85057465374 | - |
dc.citation.endPage | 101 | - |
dc.citation.number | 2 | - |
dc.citation.startPage | 97 | - |
dc.citation.title | CURRENT APPLIED PHYSICS | - |
dc.citation.volume | 19 | - |
dc.type.docType | Article | - |
dc.publisher.location | 네델란드 | - |
dc.subject.keywordAuthor | Thermoelectric | - |
dc.subject.keywordAuthor | Bi2Te3 | - |
dc.subject.keywordAuthor | Nano-plate | - |
dc.subject.keywordPlus | NANOSTRUCTURED THERMOELECTRICS | - |
dc.subject.keywordPlus | POLYVINYLPYRROLIDONE PVP | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | FIGURE | - |
dc.subject.keywordPlus | MERIT | - |
dc.subject.keywordPlus | POWER | - |
dc.subject.keywordPlus | EFFICIENCY | - |
dc.subject.keywordPlus | PBTE | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.description.journalRegisteredClass | sci | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.description.journalRegisteredClass | kci | - |
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