title: X-ray resonant single-crystal diffraction technique, a powerful tool to investigate the kesterite structure of the photovoltaic Cu2ZnSnS4 compound.
abstract: Cu/Zn disorder in the kesterite Cu2ZnSnS4 derivatives used for thin film based solar cells is an important issue for photovoltaic performances. Unfortunately, Cu and Zn cannot be distinguished by conventional laboratory X-ray diffraction. This paper reports on a resonant diffraction investigation of a Cu2ZnSnS4 single crystal from a quenched powdered sample. The full disorder of Cu and Zn in the z = 1/4 atomic plane is shown. The structure, namely disordered kesterite, is then described in the I42m space group.
authors.affiliation: Institut des Matériaux Jean Rouxel (IMN), Université de Nantes - CNRS, 2 rue de la Houssiniere, BP 32229, 44322 Nantes CEDEX 03, France.
authors.forename: Alain
authors.initials: A
authors.lastname: Lafond
authors.affiliation: Institut des Matériaux Jean Rouxel (IMN), Université de Nantes - CNRS, 2 rue de la Houssiniere, BP 32229, 44322 Nantes CEDEX 03, France.
authors.forename: Léo
authors.initials: L
authors.lastname: Choubrac
authors.affiliation: Institut des Matériaux Jean Rouxel (IMN), Université de Nantes - CNRS, 2 rue de la Houssiniere, BP 32229, 44322 Nantes CEDEX 03, France.
authors.forename: Catherine
authors.initials: C
authors.lastname: Guillot-Deudon
authors.affiliation: Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette CEDEX, France.
authors.forename: Pierre
authors.initials: P
authors.lastname: Fertey
authors.affiliation: Institut des Matériaux Jean Rouxel (IMN), Université de Nantes - CNRS, 2 rue de la Houssiniere, BP 32229, 44322 Nantes CEDEX 03, France.
authors.forename: Michel
authors.initials: M
authors.lastname: Evain
authors.affiliation: Institut des Matériaux Jean Rouxel (IMN), Université de Nantes - CNRS, 2 rue de la Houssiniere, BP 32229, 44322 Nantes CEDEX 03, France.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Jobic
keywords: X-ray resonant single-crystal diffraction; disorder; keserite; photovoltaic materials