Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Solution-based synthesis and processing of Sn- and Bi-doped Cu3SbSe4 nanocrystals, nanomaterials and ring-shaped thermoelectric generators
Research Areas
  • Nanomaterials,
  • Materials for electric engineering and electronics
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.
Journal of Materials Chemistry a
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  • Autor: Y. Liu
  • Autor: Gregorio Jose Garcia Moreno (UPM)
  • Autor: S. Ortega
  • Autor: D. Cadavid
  • Autor: Pablo Palacios Clemente (UPM)
  • Autor: J. Lu
  • Autor: M. Ibáñez
  • Autor: L. Xi
  • Autor: J. De Roo
  • Autor: A.M. López
  • Autor: S. Martí-Sánchez
  • Autor: I. Cabezas
  • Autor: M. D. L. Mata
  • Autor: Z. Luo
  • Autor: C. Dun
  • Autor: O. Dobrozhan
  • Autor: D.L. Carroll
  • Autor: W. Zhang
  • Autor: J. Martins
  • Autor: M.V. Kovalenko
  • Autor: J. Arbiol
  • Autor: G. Noriega
  • Autor: J. Song
  • Autor: Perla Wahnon Benarroch (UPM)
  • Autor: A. Cabot
Research Group, Departaments and Institutes related
  • Creador: Centro o Instituto I+D+i: Instituto de Energía Solar
  • Departamento: Física Aplicada a Las Ingenierías Aeronáutica y Naval
S2i 2021 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)