Phase transition enhanced thermoelectric performance in Cu2Se

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dc.contributor.authorLiu, Hen_AU
dc.contributor.authorShi, Xen_AU
dc.contributor.authorZhang, Wen_AU
dc.contributor.authorChen, Len_AU
dc.contributor.authorDanilkin, SAen_AU
dc.date.accessioned2022-04-19T01:35:28Zen_AU
dc.date.available2022-04-19T01:35:28Zen_AU
dc.date.issued2014-02-06en_AU
dc.date.statistics2021-09-15en_AU
dc.description.abstractWorldwide efforts to searching for good thermoelectric materials are frequently focusing on normal phases in crystalline semiconductors. The material’s thermoelectric performance is described the parameter of figure of merit, zT, which is around unity around room temperature and above 1.5 at high temperatures. In the Cu2Se with anti-fluorite structure above 400K, Se atoms form a rigid face-centred cubic lattice, while the copper ions are highly disordered or moving around the tetrahedral voids with liquid-like mobility, resulting in an extraordinarily low lattice thermal conductivity, which enables zT up to 1.5 at 1,000K. Here, we report significantly enhanced thermoelectric performance during the phase transitions in Cu2Se and iodine doped Cu2Se. It is showed that the critical electron and phonon scattering greatly improve the thermopower and strongly reduce the thermal coductivity, leading to the improvement in the figure of merit more than 3-7 times compared to the normal phases, and achieving zT value of 2.3 at 400K. This mechanism pave a new way to increase the figure of merit of thermoelectric materials, and expend the utility of thermoelectrics in electronic cooling industry.zen_AU
dc.identifier.citationLiu, H., Shi, X., Zhang, W., Chen, L., & Danilkin, S. (2014). Phase transition enhanced thermoelectric performance in Cu2Se. Poster presented to the 38th Annual Condensed Matter and Materials Meeting 2014, Waiheke Island Resort, Waiheke, Auckland, New Zealand; 4th February - 7th February, 2014. Retrieved from: https://physics.org.au/wp-content/uploads/cmm/2014/Wagga2014proceedings.pdfen_AU
dc.identifier.conferenceenddate7 February 2014en_AU
dc.identifier.conferencename38th Annual Condensed Matter and Materials Meeting 2014en_AU
dc.identifier.conferenceplaceAuckland, New Zealanden_AU
dc.identifier.conferencestartdate4 February 2014en_AU
dc.identifier.isbn978-0-646-93339-9en_AU
dc.identifier.otherTP15en_AU
dc.identifier.urihttps://physics.org.au/wp-content/uploads/cmm/2014/Wagga2014proceedings.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13033en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Physicsen_AU
dc.subjectChalcogenidesen_AU
dc.subjectCopper compoundsen_AU
dc.subjectElectrical propertiesen_AU
dc.subjectHalogensen_AU
dc.subjectMaterialsen_AU
dc.subjectNonmetalsen_AU
dc.subjectPhase transformationsen_AU
dc.subjectPhysical propertiesen_AU
dc.subjectSelenium compoundsen_AU
dc.subjectSemiconductor materialsen_AU
dc.subjectThermodynamic propertiesen_AU
dc.subjectTransition element compoundsen_AU
dc.titlePhase transition enhanced thermoelectric performance in Cu2Seen_AU
dc.typeConference Posteren_AU
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