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Solution-based synthesis and processing of Sn- and Bi-doped Cu3SbSe4 nanocrystals, nanomaterials and ring-shaped thermoelectric generators

(2017) JOURNAL OF MATERIALS CHEMISTRY A. 5(6). p.2592-2602
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Abstract
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 degrees 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.
Keywords
COPPER CHALCOGENIDE NANOCRYSTALS, COLLOIDAL NANOCRYSTALS, SURFACE-CHEMISTRY, CU2ZNSNS4 NANOCRYSTALS, ANTIMONY-SULFIDE, BUILDING-BLOCKS, PERFORMANCE, TERNARY, NANOCOMPOSITES, NANOPARTICLES

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Citation

Please use this url to cite or link to this publication:

Chicago
Liu, Yu, Gregorio García, Silvia Ortega, Doris Cadavid, Pablo Palacios, Jinyu Lu, Maria Ibáñez, et al. 2017. “Solution-based Synthesis and Processing of Sn- and Bi-doped Cu3SbSe4 Nanocrystals, Nanomaterials and Ring-shaped Thermoelectric Generators.” Journal of Materials Chemistry A 5 (6): 2592–2602.
APA
Liu, Yu, García, G., Ortega, S., Cadavid, D., Palacios, P., Lu, J., Ibáñez, M., et al. (2017). Solution-based synthesis and processing of Sn- and Bi-doped Cu3SbSe4 nanocrystals, nanomaterials and ring-shaped thermoelectric generators. JOURNAL OF MATERIALS CHEMISTRY A, 5(6), 2592–2602.
Vancouver
1.
Liu Y, García G, Ortega S, Cadavid D, Palacios P, Lu J, et al. Solution-based synthesis and processing of Sn- and Bi-doped Cu3SbSe4 nanocrystals, nanomaterials and ring-shaped thermoelectric generators. JOURNAL OF MATERIALS CHEMISTRY A. 2017;5(6):2592–602.
MLA
Liu, Yu et al. “Solution-based Synthesis and Processing of Sn- and Bi-doped Cu3SbSe4 Nanocrystals, Nanomaterials and Ring-shaped Thermoelectric Generators.” JOURNAL OF MATERIALS CHEMISTRY A 5.6 (2017): 2592–2602. Print.
@article{8502440,
  abstract     = {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 degrees 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.},
  author       = {Liu, Yu and García, Gregorio and Ortega, Silvia and Cadavid, Doris and Palacios, Pablo and Lu, Jinyu and Ibáñez, Maria and Xi, LiLi and De Roo, Jonathan and López, Antonio M and Martí-Sánchez, Sara and Cabezas, Ignasi and  de la Mata, Maria and Luo, Zhishan and Dun, Chaochao and Dobrozhan, Oleksandr and Carroll, David L and Zhang, Wenqing and Martins, José and Kovalenko, Maksym V and Arbiol, Jordi and Noriega, German and Song, Jiming and Wahnón, Perla and Cabot, Andreu},
  issn         = {2050-7488},
  journal      = {JOURNAL OF MATERIALS CHEMISTRY A},
  keywords     = {COPPER CHALCOGENIDE NANOCRYSTALS,COLLOIDAL NANOCRYSTALS,SURFACE-CHEMISTRY,CU2ZNSNS4 NANOCRYSTALS,ANTIMONY-SULFIDE,BUILDING-BLOCKS,PERFORMANCE,TERNARY,NANOCOMPOSITES,NANOPARTICLES},
  language     = {eng},
  number       = {6},
  pages        = {2592--2602},
  title        = {Solution-based synthesis and processing of Sn- and Bi-doped Cu3SbSe4 nanocrystals, nanomaterials and ring-shaped thermoelectric generators},
  url          = {http://dx.doi.org/10.1039/c6ta08467b},
  volume       = {5},
  year         = {2017},
}

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