Characterization and Seebeck coefficient of mesoporous silicon: effect of nanographene incorporation
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| Název: | Characterization and Seebeck coefficient of mesoporous silicon: effect of nanographene incorporation |
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| Autoři: | Nar, Sibel, Stolz, Arnaud, Machon, Denis, Bourhis, Eric, Andreazza, Pascal, Boucherif, Abderraouf, Semmar, Nadjib |
| Přispěvatelé: | Groupe de recherches sur l'énergétique des milieux ionisés (GREMI), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Nanotechnologies et Nanosystèmes Sherbrooke (LN2), Université de Sherbrooke = University of Sherbrooke (UdeS)-École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut Lumière Matière Villeurbanne (ILM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Interfaces, Confinement, Matériaux et Nanostructures (ICMN) |
| Zdroj: | 19th European Conference on Thermoelectrics (ECT 2023) https://hal.science/hal-04229869 19th European Conference on Thermoelectrics (ECT 2023), Sep 2023, Prague, Czech Republic |
| Informace o vydavateli: | CCSD |
| Rok vydání: | 2023 |
| Sbírka: | Université de Lyon: HAL |
| Témata: | mesoporous silicon, electrochemical etching, nanographene incorporation, Seebeck coefficient, ZT-meter, [PHYS]Physics [physics] |
| Geografické téma: | Prague, Czech Republic |
| Popis: | International audience ; As derived from silicon substrate, meso-porous Si could be a competitive candidate for many thermoelectric applications for micro-systems namely due to the huge decrease of its intrinsic thermal conductivity. As reported in the literature, this can offer a higher figure of merit as well as a more significant efficiency for energy harvesting at the microscale level at room temperature. In addition, to consider the electronic transport that is lowered by the fabrication process, a graphenisation step is investigated [2] both on the structural and thermoelectric behavior of the mesoporous complex Si matrix.Porous silicon membrane is obtained by electrochemical etching process from an electrolytic solution of hydrofluoric acid and ethanol. Depending on numerous parameters (porosity, pore size distribution, porous thickness.) the Seebeck coefficient will be experimentally investigated accordingly to key process parameters and correlated to the membrane morphology and structural characteristics.Using a new home-made thermoelectric device specifically designed for porous membranes will make possible to evaluate the Seebeck coefficient in the range of 30 to 70 °C [3]. Systematic investigation of graphenized and non-graphenized membranes is conducted to determine the contribution of the graphene in the thermoelectric properties, especially on Seebeck coefficient (S) and electrical conductivity (σ).Thanks to these thermoelectrical properties, it will possible to evaluate the power factor (σ S²) for carbon coated and uncoated mesoporous matrix. |
| Druh dokumentu: | conference object still image |
| Jazyk: | English |
| Dostupnost: | https://hal.science/hal-04229869 https://hal.science/hal-04229869v1/document https://hal.science/hal-04229869v1/file/ECT_poster_NAR.pdf |
| Rights: | info:eu-repo/semantics/OpenAccess |
| Přístupové číslo: | edsbas.95A7F9A6 |
| Databáze: | BASE |
Nájsť tento článok vo Web of Science | Abstrakt: | International audience ; As derived from silicon substrate, meso-porous Si could be a competitive candidate for many thermoelectric applications for micro-systems namely due to the huge decrease of its intrinsic thermal conductivity. As reported in the literature, this can offer a higher figure of merit as well as a more significant efficiency for energy harvesting at the microscale level at room temperature. In addition, to consider the electronic transport that is lowered by the fabrication process, a graphenisation step is investigated [2] both on the structural and thermoelectric behavior of the mesoporous complex Si matrix.Porous silicon membrane is obtained by electrochemical etching process from an electrolytic solution of hydrofluoric acid and ethanol. Depending on numerous parameters (porosity, pore size distribution, porous thickness.) the Seebeck coefficient will be experimentally investigated accordingly to key process parameters and correlated to the membrane morphology and structural characteristics.Using a new home-made thermoelectric device specifically designed for porous membranes will make possible to evaluate the Seebeck coefficient in the range of 30 to 70 °C [3]. Systematic investigation of graphenized and non-graphenized membranes is conducted to determine the contribution of the graphene in the thermoelectric properties, especially on Seebeck coefficient (S) and electrical conductivity (σ).Thanks to these thermoelectrical properties, it will possible to evaluate the power factor (σ S²) for carbon coated and uncoated mesoporous matrix. |
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