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Crystallographic control at the nanoscale to enhance functionality: polytypic Cu2GeSe3 nanoparticles as thermoelectric materials

hal.structure.identifierDepartment d'Electrònica
dc.contributor.authorIBÁÑEZ, Maria
hal.structure.identifierCatalonia Institute for Energy Research [IREC]
hal.structure.identifierInstitut de Ciència de Materials de Barcelona [ICMAB]
dc.contributor.authorZAMANI, Reza
hal.structure.identifierCatalonia Institute for Energy Research [IREC]
dc.contributor.authorLI, Wenhua
hal.structure.identifierCatalonia Institute for Energy Research [IREC]
dc.contributor.authorCADAVID, Doris
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGORSSE, Stéphane
hal.structure.identifierLaboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
dc.contributor.authorKATCHO, Nebil A.
hal.structure.identifierCatalonia Institute for Energy Research [IREC]
dc.contributor.authorSHAVEL, Alexey
hal.structure.identifierDepartament d'Enginyeria Electrónica
dc.contributor.authorLÓPEZ, Antonio M.
hal.structure.identifierCatalonia Institute for Energy Research [IREC]
hal.structure.identifierDepartment d'Electrònica
dc.contributor.authorRAMON MORANTE, Joan
hal.structure.identifierInstitut de Ciència de Materials de Barcelona [ICMAB]
hal.structure.identifierInstitució Catalana de Recerca i Estudis Avançats = Catalan Institution for Research and Advanced Studies [ICREA]
dc.contributor.authorARBIOL, Jordi
hal.structure.identifierInstitució Catalana de Recerca i Estudis Avançats = Catalan Institution for Research and Advanced Studies [ICREA]
dc.contributor.authorCABOT, Andreu
dc.date.issued2012
dc.identifier.issn0897-4756
dc.description.abstractEnThe potential to control the composition and crystal phase at the nanometer scale enable the production of nanocrystalline materials with enhanced functionalities and new applications. In the present work, we detail a novel colloidal synthesis route to prepare nanoparticles of the ternary semiconductor Cu2GeSe3 (CGSe) with nanometer-scale control over their crystal phases. We also demonstrate the structural effect on the thermoelectric properties of bottom-up-prepared CGSe nanomaterials. By careful adjustment of the nucleation and growth temperatures, pure orthorhombic CGSe nanoparticles with cationic order or polytypic CGSe nanoparticles with disordered cation positions can be produced. In this second type of nanoparticle, a high density of twins can be created to periodically change the atomic plane stacking, forming a hexagonal wurtzite CGSe phase. The high yield of the synthetic routes reported here allows the production of single-phase and multiphase CGSe nanoparticles in the gram scale, which permits characterization of the thermoelectric properties of these materials. Reduced thermal conductivities and a related 2.5-fold increase of the thermoelectric figure of merit for multiphase nanomaterials compared to pure-phase CGSe are systematically obtained. These results are discussed in terms of the density and efficiency of phonon scattering centers in both types of materials.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.subject.enCrystallography
dc.subject.enThermoelectric materials
dc.subject.enNanoparticles
dc.title.enCrystallographic control at the nanoscale to enhance functionality: polytypic Cu2GeSe3 nanoparticles as thermoelectric materials
dc.typeArticle de revue
dc.identifier.doi10.1021/cm303252q
dc.subject.halChimie/Matériaux
bordeaux.journalChemistry of Materials
bordeaux.page4615-4622
bordeaux.volume24
bordeaux.issue23
bordeaux.peerReviewedoui
hal.identifierhal-00975240
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00975240v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Chemistry%20of%20Materials&rft.date=2012&rft.volume=24&rft.issue=23&rft.spage=4615-4622&rft.epage=4615-4622&rft.eissn=0897-4756&rft.issn=0897-4756&rft.au=IB%C3%81%C3%91EZ,%20Maria&ZAMANI,%20Reza&LI,%20Wenhua&CADAVID,%20Doris&GORSSE,%20St%C3%A9phane&rft.genre=article


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