Patent ID: 7838437

Claim:
Method for the production of a doped semiconductor layer system for electronics or photovoltaics, wherein in a first step, a substrate base layer is ( 1 ) produced, in a second step, on this substrate base layer ( 1 ) an intermediate layer system ( 2 ) comprising at least one partial layer is deposited, at least one of the partial layers of the intermediate layer system ( 2 ) being enriched with a first dopant in a first concentration, in a third step, an absorber layer ( 3 ) which is doped with a second dopant in a second concentration is deposited on the intermediate layer system ( 2 ), in a recrystallisation step, the absorber layer ( 3 ) is heated and brought to melt and is cooled subsequently in order to solidify, the recrystallisation step is controlled such or in that it is heated, cooled and tempered such that the first dopant diffuses out of the intermediate layer system ( 2 ) into the absorber layer ( 3 ), while the latter is molten and/or while the latter is resolidifying and/or while the latter has solidified.