METHOD FOR PRODUCING A MONOCRYSTALLINE CU(IN,GA)SE<SB>2</SB> POWDER, AND MONOGRAIN MEMBRANE SOLAR CELL CONTAINING SAID POWDER

摘要

The invention relates to a method for producing a powder consisting of a Cu(In,Ga)Se2 compound, said method comprising the following steps: Cu and In and/or Cu and Ga are alloyed to form a CuIn and/or CuGa alloy with a substoichiometric part of Cu; a powder consisting of said CuIn and/or CuGa alloy is produced; Se and either KI or NaI are added to the powder; the mixture is heated until a melted mass is formed, in which the Cu(In,Ga)Se2 compound recrystallises, and the powder grains to be produced simultaneously grow; and the melted mass is cooled in order to interrupt the growth of the grains. The invention also relates to a monograin membrane solar cell containing a back contact, a monograin membrane, at least one semiconductor layer, and a front contact, said solar cell being characterised in that the monograin membrane contains a powder produced by the inventive method.