Article High-power-density hybrid planar-type silicon thermoelectric generator with phononic nanostructures

Ryoto Yanagisawa ORCID (Institute of Industrial Science, The University of Tokyo) ; Sota Koike (Institute of Industrial Science, The University of Tokyo) ; Tomoki Nawae (Institute of Industrial Science, The University of Tokyo) ; Naohito Tsujii SAMURAI ORCID (Research Center for Materials Nanoarchitectonics (MANA)/Nanomaterials Field/Thermal Energy Materials Group, National Institute for Materials ScienceROR) ; Yanan Wang ORCID (International Center for Materials Nanoarchitectonics/Nano-Materials Field/Thermal Energy Materials Group, National Institute for Materials ScienceROR) ; Takao Mori SAMURAI ORCID (Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials ScienceROR) ; Patrick Ruther (Department of Microsystems Engineering (IMTEK), University of Freiburg) ; Oliver Paul (Department of Microsystems Engineering (IMTEK), University of Freiburg) ; Yoshifumi Yoshida ORCID (Seiko Future Creation Inc.,) ; Junichi Harashima (TOPPAN INC) ; Takashi Kinumura (Maeda Corporation) ; Yuta Inada (Maeda Corporation) ; Nomura Masahiro ORCID (Institute of Industrial Science, The University of Tokyo)

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Ryoto Yanagisawa, Sota Koike, Tomoki Nawae, Naohito Tsujii, Yanan Wang, Takao Mori, Patrick Ruther, Oliver Paul, Yoshifumi Yoshida, Junichi Harashima, Takashi Kinumura, Yuta Inada, Nomura Masahiro. High-power-density hybrid planar-type silicon thermoelectric generator with phononic nanostructures. Materials Today Physics. 2024, 45 (), 101452. https://doi.org/10.1016/j.mtphys.2024.101452
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(abstract)

Energy harvesting is essential for the internet-of-things networks where a tremendous number of sensors require power. Thermoelectric generators (TEGs), especially those based on silicon (Si), are a promising source of clean and sustainable energy for these sensors. However, the reported performance of Si TEGs never exceeded power factors of 0.1 μW〖cm〗^(-2) K^(-2) due to the poor thermoelectric performance of Si and the suboptimal design of the devices. Here, we report a planar-type Si TEG with a power factor of 1.3 μW〖cm〗^(-2) K^(-2). The increase in thermoelectric performance of Si by nanostructuring based on the phonon-glass electron-crystal concept and optimized three-dimensional heat-guiding structures resulted in a significant power factor. In-field testing demonstrated that our Si TEG functions as a 100-W-class harvester. This result is an essential step toward energy harvesting with a low-environmental load and cost-effective material with high throughput, a necessary condition for energy-autonomous sensor nodes for the trillion sensors universe.

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Keyword: thermoelectric

Date published: 2024-05-07

Publisher: Elsevier

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  • Materials Today Physics (ISSN: 25425293) vol. 45 101452

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Manuscript type: Publisher's version (Version of record)

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First published URL: https://doi.org/10.1016/j.mtphys.2024.101452

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Updated at: 2024-10-07 14:41:45 +0900

Published on MDR: 2024-10-07 14:41:45 +0900

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