Thermoelectric properties of semiconductor-metal composites produced by particle blending
In the quest for more efficient thermoelectric material able to convert thermal to electrical energy and vice versa, composites that combine a semiconductor host having a large Seebeck coefficient with metal nanodomains that provide phonon scattering and free charge carriers are particularly appeali...
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Series: | APL Materials |
Online Access: | http://dx.doi.org/10.1063/1.4961679 |
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doaj-1cf5a4a746fb4796a6de9777cb169b862020-11-25T00:57:21ZengAIP Publishing LLCAPL Materials2166-532X2016-10-01410104813104813-710.1063/1.4961679018695APMThermoelectric properties of semiconductor-metal composites produced by particle blendingYu Liu0Doris Cadavid1Maria Ibáñez2Silvia Ortega3Sara Martí-Sánchez4Oleksandr Dobrozhan5Maksym V. Kovalenko6Jordi Arbiol7Andreu Cabot8Catalonia Institute for Energy Reseach-IREC, Sant Adrià de Besòs, 08930 Barcelona, SpainCatalonia Institute for Energy Reseach-IREC, Sant Adrià de Besòs, 08930 Barcelona, SpainDepartment of Chemistry and Applied Biosciences, Institute of Inorganic Chemistry, ETH Zürich CH-8093, SwitzerlandCatalonia Institute for Energy Reseach-IREC, Sant Adrià de Besòs, 08930 Barcelona, SpainCSIC and The Barcelona Institute of Science and Technology, Catalan Institute of Nanoscience and Nanotechnology (ICN2), Bellaterra, 08193 Barcelona, Catalonia, SpainCatalonia Institute for Energy Reseach-IREC, Sant Adrià de Besòs, 08930 Barcelona, SpainDepartment of Chemistry and Applied Biosciences, Institute of Inorganic Chemistry, ETH Zürich CH-8093, SwitzerlandCSIC and The Barcelona Institute of Science and Technology, Catalan Institute of Nanoscience and Nanotechnology (ICN2), Bellaterra, 08193 Barcelona, Catalonia, SpainCatalonia Institute for Energy Reseach-IREC, Sant Adrià de Besòs, 08930 Barcelona, SpainIn the quest for more efficient thermoelectric material able to convert thermal to electrical energy and vice versa, composites that combine a semiconductor host having a large Seebeck coefficient with metal nanodomains that provide phonon scattering and free charge carriers are particularly appealing. Here, we present our experimental results on the thermal and electrical transport properties of PbS-metal composites produced by a versatile particle blending procedure, and where the metal work function allows injecting electrons to the intrinsic PbS host. We compare the thermoelectric performance of composites with microcrystalline or nanocrystalline structures. The electrical conductivity of the microcrystalline host can be increased several orders of magnitude with the metal inclusion, while relatively high Seebeck coefficient can be simultaneously conserved. On the other hand, in nanostructured materials, the host crystallites are not able to sustain a band bending at its interface with the metal, becoming flooded with electrons. This translates into even higher electrical conductivities than the microcrystalline material, but at the expense of lower Seebeck coefficient values.http://dx.doi.org/10.1063/1.4961679 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yu Liu Doris Cadavid Maria Ibáñez Silvia Ortega Sara Martí-Sánchez Oleksandr Dobrozhan Maksym V. Kovalenko Jordi Arbiol Andreu Cabot |
spellingShingle |
Yu Liu Doris Cadavid Maria Ibáñez Silvia Ortega Sara Martí-Sánchez Oleksandr Dobrozhan Maksym V. Kovalenko Jordi Arbiol Andreu Cabot Thermoelectric properties of semiconductor-metal composites produced by particle blending APL Materials |
author_facet |
Yu Liu Doris Cadavid Maria Ibáñez Silvia Ortega Sara Martí-Sánchez Oleksandr Dobrozhan Maksym V. Kovalenko Jordi Arbiol Andreu Cabot |
author_sort |
Yu Liu |
title |
Thermoelectric properties of semiconductor-metal composites produced by particle blending |
title_short |
Thermoelectric properties of semiconductor-metal composites produced by particle blending |
title_full |
Thermoelectric properties of semiconductor-metal composites produced by particle blending |
title_fullStr |
Thermoelectric properties of semiconductor-metal composites produced by particle blending |
title_full_unstemmed |
Thermoelectric properties of semiconductor-metal composites produced by particle blending |
title_sort |
thermoelectric properties of semiconductor-metal composites produced by particle blending |
publisher |
AIP Publishing LLC |
series |
APL Materials |
issn |
2166-532X |
publishDate |
2016-10-01 |
description |
In the quest for more efficient thermoelectric material able to convert thermal to electrical energy and vice versa, composites that combine a semiconductor host having a large Seebeck coefficient with metal nanodomains that provide phonon scattering and free charge carriers are particularly appealing. Here, we present our experimental results on the thermal and electrical transport properties of PbS-metal composites produced by a versatile particle blending procedure, and where the metal work function allows injecting electrons to the intrinsic PbS host. We compare the thermoelectric performance of composites with microcrystalline or nanocrystalline structures. The electrical conductivity of the microcrystalline host can be increased several orders of magnitude with the metal inclusion, while relatively high Seebeck coefficient can be simultaneously conserved. On the other hand, in nanostructured materials, the host crystallites are not able to sustain a band bending at its interface with the metal, becoming flooded with electrons. This translates into even higher electrical conductivities than the microcrystalline material, but at the expense of lower Seebeck coefficient values. |
url |
http://dx.doi.org/10.1063/1.4961679 |
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