Ingénierie des matériaux et de microgénérateurs thermoélectriques planaires

Abstract : Planar microthermoelectric generators are new energy sources for portable electronics. We have optimized their geometry by using an analytical and numerical model. The fabrication process of a generator using polycrystallin silicon as the active material is also presented. The access to the thermal conductivity is essential for the engineering of thermoelectric materials the microgenerators are made of. The potential of the 3omega and Volklein methods to measure the thermal conductivity of thin films is investigated experimentally and by numerical simulations. The heat transfer between microsystems and their environment is studied by the Volklein method. The figure of merit of polycristallin silicon layers has been improved by a factor of three but is still very low. The electrical propeties of lead telluride-based multilayers offer good prospects for their integration in micro systems.
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Alexandre Jacquot. Ingénierie des matériaux et de microgénérateurs thermoélectriques planaires. Autre [cond-mat.other]. Institut National Polytechnique de Lorraine, 2003. Français. ⟨NNT : 2003INPL017N⟩. ⟨tel-01749832⟩

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