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Página principal > Artículos > Artículos publicados > Room temperature aqueous-based synthesis of copper-doped lead sulfide nanoparticles for thermoelectric application |
Fecha: | 2022 |
Resumen: | A versatile, scalable, room temperature and surfactant-free route for the synthesis of metal chalcogenide nanoparticles in aqueous solution is detailed here for the production of PbS and Cu-doped PbS nanoparticles. Subsequently, nanoparticles are annealed in a reducing atmosphere to remove surface oxide, and consolidated into dense polycrystalline materials by means of spark plasma sintering. By characterizing the transport properties of the sintered material, we observe the annealing step and the incorporation of Cu to play a key role in promoting the thermoelectric performance of PbS. The presence of Cu allows improving the electrical conductivity by increasing the charge carrier concentration and simultaneously maintaining a large charge carrier mobility, which overall translates into record power factors at ambient temperature, 2. 3 mWmK. Simultaneously, the lattice thermal conductivity decreases with the introduction of Cu, leading to a record high ZT = 0. 37 at room temperature and ZT = 1. 22 at 773 K. Besides, a record average ZT = 0. 76 is demonstrated in the temperature range 320-773 K for n-type Pb0. 955Cu0. 045S. |
Ayudas: | European Commission 754411 Ministerio de Ciencia e Innovación PID2020-116093RB-C43 Ministerio de Economía y Competitividad SEV-2017-0706 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-327 |
Nota: | Altres ajuts: TZ has received funding from the CSC-UAB PhD scholarship program. ICN2 is funded by the CERCA Programme / Generalitat de Catalunya. Part of the present work has been performed in the framework of Universitat Autònoma de Barcelona Materials Science PhD program. |
Derechos: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
Lengua: | Anglès |
Documento: | Article ; recerca ; Versió sotmesa a revisió |
Materia: | PbS ; Aqueous synthesis ; Nanoparticles ; Thermoelectricity ; Copper-doping |
Publicado en: | Chemical engineering journal, Vol. 433, issue 3 (April 2022) , art. 133837, ISSN 1873-3212 |
Preprint 31 p, 1.4 MB |