Accroissement de l'absorption lumineuse au sein de cellules solaires à couches minces de silicium par addition de nanoparticules et de nanostructures métalliques

Abstract : In order to achieve high efficiencies, thin-film silicon solar cells need an efficient light absorption. In this thesis, we discuss new approaches based on metal nanoparticules and metal nanostructures for light trapping in thin-film silicon solar cells, The specific optical properties of metallic nanoparticles are a consequence of the appearence of a resonance in their absorption and scattering spectra, know as the localized surface plasmon( LSP) resonance. For sufficiently small particles (<50 nm), the LSP absorption is accompanied by a strong enhancement of the electromagnetic field inside and in the surrounding of the nanoparticles. The first part of this work is motivated by the utilization of this enhanced electromagnetic field. In this approach, we target to confine the light in the active layer of thin-film silicon solar cells, The second approach is based on the light scattering of large metal nanoparticles or nanostructures. The scateering cross section of metallic nanoparticules increases rapidly with their diameter and experiences a resonance at the LSP excitation. Therefore, large metal nanoparticules and metal nanostructures were integrated at the back side of thin-film silicon solar cells
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Etienne Moulin. Accroissement de l'absorption lumineuse au sein de cellules solaires à couches minces de silicium par addition de nanoparticules et de nanostructures métalliques. Autre [cond-mat.other]. Université Paul Verlaine - Metz, 2009. Français. ⟨NNT : 2009METZ051S⟩. ⟨tel-01752671⟩

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