title: Simple approach for the fabrication of PEDOT-coated Si nanowires.
abstract: The synthesis of a conformal poly(3,4-ethylenedioxythiophene) (PEDOT) layer on Si nanowires was demonstrated using a pulsed electrodeposition technique. N-type Si nanowire (SiNWs) arrays were synthesized using an electroless metal-assisted chemical etching technique. The dependence of the SiNW reflection on the concentration of the AgNO3 solution was identified. A reflection of less than 2% over the entire visible spectral range was obtained for these structures, evidencing their excellent antireflective properties. The etched SiNWs nanostructures can be further modified by using a tapering technique, which further preserves the strong light trapping effect. P-type PEDOT was grown on these SiNWs using electrochemical methods. Since the polymerization reaction is a very fast process with regards to monomer diffusion along the SiNW, the conformal deposition by classical, fixed potential deposition was not favored. Instead, the core-shell heterojunction structure was finally achieved by a pulsed deposition method. An extremely large shunt resistance was exhibited and determined to be related to the diffusion conditions occurring during polymerization.
authors.affiliation: Aix-Marseille University, Institut Matériaux Microélectronique Nanosciences de Provence-IM2NP, CNRS-UMR 7334, équipe OPTO-PV, Domaine Universitaire de Saint-Jérôme, Service 231, 13397 Marseille Cedex 20, France ; Ecole Centrale Marseille, 38 rue Joliot Curie, 13451 Marseille Cedex 20, France ; Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yutian Road, 200240 Shanghai, China.
authors.forename: Mingxuan
authors.initials: M
authors.lastname: Zhu
authors.affiliation: Aix-Marseille University, CNRS, MADIREL UMR 7246, équipe Electrochimie des Matériaux, 13397 Marseille Cedex 20, France.
authors.forename: Marielle
authors.initials: M
authors.lastname: Eyraud
authors.affiliation: Aix-Marseille University, Institut Matériaux Microélectronique Nanosciences de Provence-IM2NP, CNRS-UMR 7334, équipe OPTO-PV, Domaine Universitaire de Saint-Jérôme, Service 231, 13397 Marseille Cedex 20, France.
authors.forename: Judikael Le
authors.initials: JL
authors.lastname: Rouzo
authors.affiliation: Université Abderrahmane Mira, Lab. d'Electrochimie, Corrosion et de Valorisation énergétique, 06000 Bejaia, Algeria.
authors.forename: Nadia
authors.initials: N
authors.lastname: Ait Ahmed
authors.affiliation: Aix-Marseille University, CNRS, MADIREL UMR 7246, équipe Electrochimie des Matériaux, 13397 Marseille Cedex 20, France.
authors.forename: Florence
authors.initials: F
authors.lastname: Boulc'h
authors.affiliation: Aix-Marseille University, Institut Matériaux Microélectronique Nanosciences de Provence-IM2NP, CNRS-UMR 7334, équipe OPTO-PV, Domaine Universitaire de Saint-Jérôme, Service 231, 13397 Marseille Cedex 20, France.
authors.forename: Claude
authors.initials: C
authors.lastname: Alfonso
authors.affiliation: Aix-Marseille University, CNRS, MADIREL UMR 7246, équipe Electrochimie des Matériaux, 13397 Marseille Cedex 20, France.
authors.forename: Philippe
authors.initials: P
authors.lastname: Knauth
authors.affiliation: Aix-Marseille University, Institut Matériaux Microélectronique Nanosciences de Provence-IM2NP, CNRS-UMR 7334, équipe OPTO-PV, Domaine Universitaire de Saint-Jérôme, Service 231, 13397 Marseille Cedex 20, France ; Ecole Centrale Marseille, 38 rue Joliot Curie, 13451 Marseille Cedex 20, France.
authors.forename: François
authors.initials: F
authors.lastname: Flory
keywords: SiNW; conductive polymer; core–shell structure; electrodeposition; hybrid material
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