Patent Number: 8,822,261

Title: Methods of making photovoltaic devices

Abstract: A method of making a photovoltaic device is presented. The method includes disposing an absorber layer on a window layer. The method further includes treating at least a portion of the absorber layer with a first solution including a first metal salt to form a first component, wherein the first metal salt comprises a first metal selected from the group consisting of manganese, cobalt, chromium, zinc, indium, tungsten, molybdenum, and combinations thereof. The method further includes treating at least a portion of the first component with cadmium chloride to form a second component. The method further includes treating at least a portion of the second component with a second solution including a second metal salt to form an interfacial layer on the second component, wherein the second metal salt comprises a second metal selected from the group consisting of manganese, cobalt, nickel, zinc, and combinations thereof.

Inventors: Foust; Donald Franklin (Glenville, NY), Cao; Hongbo (Cohoes, NY)

Assignee: First Solar, Inc.

International Classification: H01L 31/18 (20060101)

Expiration Date: 9/02/12018