The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 1992
Filed:
Apr. 15, 1991
Franz Karg, Munich, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A method for producing a solar cell having a semiconductor layer of copper gallium diselenide covered with a window layer of copper aluminum diselenide by first producing a semiconductor material of one type of conductivity by forming either a copper gallium diselenide or a copper aluminum diselenide and then exchanging metal ions in the upper portion of the layer to provide an opposite type of conductivity by exchanging metal ions of the layer for another type. The exchange can include exchanging both the copper and gallium ions with the zinc ion to form a zinc diselenide window or replacing the gallium ions with aluminum ions to form a copper aluminum diselenide window or, if a copper aluminum diselenide layer had been provided, forming an absorbing layer by replacing the aluminum ions with the gallium ions to form the absorbing layer.