Patent ID: 8956906
Filing Date: 2015-02-17
Classification: C23C,H01L,Y02E,Y02P

Abstract:
1. A method for the production of a Cu(In,Ga)(Se 2 ) semiconductor layer as an absorber layer for thin-layer solar cells by deposition of Cu, In, Ga, Se and S on a substrate that carries a back contact, the method comprising: building up an absorber layer on the substrate in a coating chamber in such a manner that at first a vacuum between 1×10 evaporating metallic components including Cu, In and/or Ga, and/or chalcogenide compounds of Cu, In, and/or Ga, in metal evaporator sources to generate metal vapor beams and focusing the metal vapor beams onto the substrate in such a manner that the metal vapor beams strike a surface of the substrate; discharging selenium and/or sulfur in an ionized manner, in an ion beam, from a chalcogen ion source such that the ion beam strikes the surface of the substrate focused in such a manner that the ion beam overlaps with the metal vapor beams; and extracting, in addition to chalcogen ions in the ion beam, electrons from the ion source, wherein distribution of the electrons also overlaps with the metal vapor beams in the coating chamber and results in an ionization and/or excitation of the metal vapor beams, whereby the deposition of the absorber layer is caused by the energy introduced by the ion beam.