Solution-based synthesis and processing of Sn- and Bi-doped Cu₃SbSe₄ nanocrystals, nanomaterials and ring-shaped thermoelectric generators
Liu, Yu (Institut de Recerca en Energia de Catalunya)
Ortega, Silvia (Institut de Recerca en Energia de Catalunya)
Cadavid, Doris (Institut de Recerca en Energia de Catalunya)
Ibáñez, Maria (ETH Zürich. Institute of Inorganic Chemistry)
Xi, Lili (Chinese Academy of Sciences. Shanghai Institute of Ceramics)
De Roo, Jonathan (Ghent University. Department of Inorganic and Physical Chemistry)
López Peña, Antonio M. (Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica)
Martí-Sánchez, Sara (Institut Català de Nanociència i Nanotecnologia)
Cabezas, Ignasi (Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica)
De La Mata, Maria (Institut Català de Nanociència i Nanotecnologia)
Luo, Zhishan (Institut de Recerca en Energia de Catalunya)
Dun, Chaochao (Wake Forest University. Center for Nanotechnology and Molecular Materials)
Dobrozhan, Oleksandr (Institut de Recerca en Energia de Catalunya)
Zhang, Wenqing (Chinese Academy of Sciences. Shanghai Institute of Ceramics)
Martins, José (Ghent University. Department of Organic and Marcromolecular Chemistry)
Kovalenko, Maksym V. (ETH Zürich. Institute of Inorganic Chemistry)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Noriega, German (Cidete Ingenieros S.L. (Vilanova i la Geltrú - España))
Song, Ji-Ming (Anhui University. School of Chemistry & Chemical Engineering)
Cabot i Codina, Andreu (Institut de Recerca en Energia de Catalunya)
Institució Catalana de Recerca i Estudis Avançats

Data:	2017
Resum:	Copper-based chalcogenides that comprise abundant, low-cost, and environmental friendly elements are excellent materials for a number of energy conversion applications, including photovoltaics, photocatalysis, and thermoelectrics (TE). In such applications, the use of solution-processed nanocrystals (NCs) to produce thin films or bulk nanomaterials has associated several potential advantages, such as high material yield and throughput, and composition control with unmatched spatial resolution and cost. Here we report on the production of Cu₃SbSe₄ (CASe) NCs with tuned amounts of Sn and Bi dopants. After proper ligand removal, as monitored by nuclear magnetic resonance and infrared spectroscopy, these NCs were used to produce dense CASe bulk nanomaterials for solid state TE energy conversion. By adjusting the amount of extrinsic dopants, dimensionless TE figures of merit (ZT) up to 1. 26 at 673 K were reached. Such high ZT values are related to an optimized carrier concentration by Sn doping, a minimized lattice thermal conductivity due to efficient phonon scattering at point defects and grain boundaries, and to an increase of the Seebeck coefficient obtained by a modification of the electronic band structure with Bi doping. Nanomaterials were further employed to fabricate ring-shaped TE generators to be coupled to hot pipes, which provided 20 mV and 1 mW per TE element when exposed to a 160 °C temperature gradient. The simple design and good thermal contact associated with the ring geometry and the potential low cost of the material solution processing may allow the fabrication of TE generators with short payback times.
Ajuts:	European Commission 310250 Ministerio de Economía y Competitividad MAT2014-59961-C2-2-R Ministerio de Economía y Competitividad ENE2013-46624-C4-3-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2013/BP-A00344 European Commission 306733 Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1638 Ministerio de Economía y Competitividad SEV/2013-0295
Drets:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Bulk nano-materials ; Composition control ; Electronic band structure ; Environmental-friendly ; Lattice thermal conductivity ; Solution-processing ; Synthesis and processing ; Thermoelectric generators
Publicat a:	Journal of materials chemistry. A, Vol. 5, Issue 6 (February 2017) , p. 2592-2602, ISSN 2050-7496

DOI: 10.1039/c6ta08467b

Post-print 18 p, 2.2 MB

El registre apareix a les col·leccions:
Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > Institut Català de Nanociència i Nanotecnologia (ICN2)
Articles > Articles de recerca
Articles > Articles publicats