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1. (WO2015043794) METHOD FOR PRODUCING THE REAR CONTACT LAYER FOR CDTE THIN-FILM SOLAR CELLS

Pub. No.:    WO/2015/043794    International Application No.:    PCT/EP2014/065251
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Thu Jul 17 01:59:59 CEST 2014
IPC: C23C 14/18
C23C 14/02
H01L 31/0224
H01L 31/18
C23C 14/06
Applicants: CHINA TRIUMPH INTERNATIONAL ENGINEERING CO., LTD.
CTF SOLAR GMBH
Inventors: SIEPCHEN, Bastian
SPÄTH, Bettina
PENG, Shou
Title: METHOD FOR PRODUCING THE REAR CONTACT LAYER FOR CDTE THIN-FILM SOLAR CELLS
Abstract:
The present invention relates to a method for producing the first layer of a rear contact layer for thin-film solar cells in a superstrate configuration. According to the prior art, this layer was deposited as a compound, for example as an Sb2Te3 layer. According to the invention, it is now proposed to produce a tellurium-rich surface layer of the cadmium telluride layer, to deposit a first material suitable for forming an electrically conductive second material in conjunction with tellurium thereon and to produce the second material through the reaction of the first material and tellurium in the surface layer. The second material forms the first layer of the rear contact layer.