Elaboration of nanostructured thin films by laser pyrolysis and magnetron sputtering combined process : application to all silicon third generation solar cells
type: Dataset
description: This work focuses on the synthesis of thin films composed of silicon nanoparticles (np- Si) embedded in a dielectric matrix for application as an active layer for the third generation solar cells. The technique used for the synthesis of np-Si is the laser pyrolysis. This technique allowed us to obtain 5 nm cristalline np -Si with a narrow size distribution. Furthermore, the use of specific precursor gases (PH₃, B₂H₆) in the reaction mixture enables doping (n or p -type) of np -Si. Effective np -Si doping has been demonstrated by measurements of electron paramagnetic resonance (EPR). Films made of np-Si only, have been deposited in situ by creating a supersonic jet of gas containing the silicon particles. Optoelectronic characterization of these layers showed a strong quantum confinement effect in films, thus ensuring a significant widening of the gap of 1.12 eV silicon (for bulk silicon) to about 2 eV (np -Si); which is an essential prerequisite to achieve a silicon tandem cell. Resistivity measurements on these films have confirmed the dopants activity in the np -Si. For np -Si doped with phosphorus, a significant decrease of the resistivity of more than five orders of magnitude compared to the intrinsic np -Si was observed. Coupling between laser pyrolysis and magnetron sputtering through our original synthesis device proved to be perfectly suited for the elaboration of nanocomposite thin films np-Si/SiO₂. A diode-type behavior has been highlighted on a junction formed by the superposition of a nanocomposite layer (n-type) on a bulk silicon substrate (p-type ). Beyond the simple application to photovoltaics , the coupled process, widely used and optimized during this work could allow the production of a multitude of different nanostructured layers , since the chemical nature of the particles and the matrix can be chosen independently.
landing page: https://theses.hal.science/tel-00958453
identifier: NNT: 2013PA112357
keyword: cellule-solaire
keyword: chimothechemical-sciencesother
keyword: confinement-quantique
keyword: couche-mince
keyword: dopage
keyword: doping
keyword: infoeu-reposemanticsdoctoralthesis
keyword: jet-supersonique
keyword: laser-pyrolysis
keyword: magnetron-sputtering
keyword: nanomaterial
keyword: nanostructures
keyword: pulverisation-magnetron
keyword: pyrolyse-laser
keyword: quantum-confinement
keyword: silicium
keyword: silicon
keyword: solar-cell
keyword: supersonic-jet
keyword: theses
keyword: thin-films
issued: 2026-05-06T01:43:18.845587
modified: 2026-05-06T01:43:18.845592
language: fr
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

Elaboration of nanostructured thin films by laser pyrolysis and magnetron sputtering combined process : application to all silicon third generation solar cells
type: Distribution
format: HTML
access URL: https://theses.hal.science/tel-00958453
issued: 2026-05-06T01:43:18.848864
modified: 2026-05-06T01:43:18.761225