Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Won, Jongin | - |
dc.contributor.author | Mun, Yeongjun | - |
dc.contributor.author | Kang, Yeong A. | - |
dc.contributor.author | Park, Woomin | - |
dc.contributor.author | Kim, Hyun-Sik | - |
dc.contributor.author | Kim, Jungwon | - |
dc.contributor.author | Jang, Kwang-Suk | - |
dc.date.accessioned | 2025-07-18T03:00:11Z | - |
dc.date.available | 2025-07-18T03:00:11Z | - |
dc.date.created | 2025-07-18 | - |
dc.date.issued | 2025-09 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.uri | https://pubs.kist.re.kr/handle/201004/152759 | - |
dc.description.abstract | We report a dual advance in wearable thermoelectrics by combining a materials-level doping strategy with a device-level architectural innovation. Freestanding, ultra-flexible Ag2Se films are doped with trace amounts (tens of ppm) of Cu2Se nanoparticles, yielding a dramatic enhancement in thermoelectric performance. At an optimal Cu2Se doping of 50 ppm, the n-type Ag2Se films achieve a room temperature zT of-0.55 (versus-0.46 for undoped films) while maintaining an extraordinary bending radius of 0.4 mm. This improvement is attributed to a finely tuned carrier concentration and increased phonon scattering imparted by the Cu2Se nanoparticle inclusions, leading to a favorable balance of Seebeck coefficient, electrical conductivity, and thermal conductivity. Building on this high-performance flexible freestanding film, we design and experimentally demonstrate a novel vertical thermoelectric generator (TEG) architecture optimized for the predominantly out-of-plane temperature gradients of human body heat. The wearable TEG generates a maximum power/area of-2.6 mu W cm-2 from a Delta T of-10 degrees C on a human forearm, substantially outperforming conventional in-plane designs. Our work highlights a synergistic approach to advance wearable energy harvesting: enhancing the intrinsic zT of flexible thermoelectric materials while pioneering device architectures that bridge the gap between material innovation and practical energy harvesting from the human body. | - |
dc.language | English | - |
dc.publisher | Elsevier BV | - |
dc.title | Enhanced zT of highly flexible freestanding Ag2Se films via Cu2Se nanoparticle doping for wearable thermoelectric generator applications | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.cej.2025.165068 | - |
dc.description.journalClass | 1 | - |
dc.identifier.bibliographicCitation | Chemical Engineering Journal, v.519 | - |
dc.citation.title | Chemical Engineering Journal | - |
dc.citation.volume | 519 | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.identifier.wosid | 001518608000020 | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental | - |
dc.relation.journalWebOfScienceCategory | Engineering, Chemical | - |
dc.relation.journalResearchArea | Engineering | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | SELENIDE THIN-FILMS | - |
dc.subject.keywordPlus | SILVER | - |
dc.subject.keywordPlus | CU2-XSE | - |
dc.subject.keywordPlus | COPPER | - |
dc.subject.keywordPlus | CU | - |
dc.subject.keywordAuthor | Wearable thermoelectric generartor | - |
dc.subject.keywordAuthor | Flexible thermoelectric films | - |
dc.subject.keywordAuthor | Silver selenide | - |
dc.subject.keywordAuthor | Nanoparticle doping | - |
dc.subject.keywordAuthor | Vertical device architecture | - |
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