Large-grain crystallized metal chalcogenide film, colloidal solution of amorphous particles, and preparation methods
AssigneeImra Europe SAS
InventorsStephane BOURDAIS, Christophe CHONE, Yan CUCCARO
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Abstract
The present invention relates to a method for preparing an aqueous or hydro-alcoholic colloidal solution of metal chalcogenide amorphous nanoparticles notably of the Cu2ZnSnS4 (CZTS) type and to the obtained colloidal solution. The present invention also relates to a method for manufacturing a film of large-grain crystallized semi-conducting metal chalcogenide film notably of CZTS obtained from an aqueous or hydro-alcoholic colloidal solution according to the invention, said film being useful as an absorption layer deposited on a substrate applied in a solid photovoltaic device.
Claims20
A colloidal solution in a dispersion solvent consisting of:
- an aqueous or hydro-alcoholic colloidal solution of amorphous nanoparticles of chalcogenide(s) of amorphous nanoparticles of metal chalcogenides of formula M-C wherein:
- M represents first metals consisting of Cu, Zn, and Sn, and
- C represents at least one chalcogenide element selected from S and Se, comprising primary nanoparticles of sizes of less than 30 nm, the alcohol of said solution, if any, being a non-toxic alcohol.
Dependencies are inferred from the claim text.