title: The stability domain of the selenide kesterite photovoltaic materials and NMR investigation of the Cu/Zn disorder in Cu2ZnSnSe4 (CZTSe).
abstract: Bulk compounds, prepared via the ceramic route, related to Cu2ZnSnSe4 (CZTSe), a material considered for use in photovoltaic devices, were investigated using NMR spectroscopy, electron-probe microanalyses and X-ray diffraction. These materials adopt the kesterite structure regardless of the Cu and Zn contents. It is also shown that the stability domain of the copper-poor quaternary phases is wider for selenide derivatives than for sulphides. Finally, the Cu/Zn disorder level in CZTSe is found to be higher when the samples are quenched, which is reminiscent of the behaviour of the parent sulphide compounds CZTS.
authors.affiliation: Institut des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS, 2, rue de la Houssinière, BP 32229, 44322 Nantes Cedex 03, France. alain.lafond@cnrs-imn.fr.
authors.forename: Léo
authors.initials: L
authors.lastname: Choubrac
authors.forename: Alain
authors.initials: A
authors.lastname: Lafond
authors.forename: Michaël
authors.initials: M
authors.lastname: Paris
authors.forename: Catherine
authors.initials: C
authors.lastname: Guillot-Deudon
authors.forename: Stéphane
authors.initials: S
authors.lastname: Jobic