Fabrication of interconnected thin-film concentrator cells using shadow masks
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United States of America Patent
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Feb 24, 2015
Grant Date -
Feb 13, 2014
app pub date -
Aug 7, 2012
filing date -
Aug 7, 2012
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Abstract
A method for fabricating thin film solar cells for a concentrated photovoltaic system uses three shadow masks. The first mask, used to deposit a back contact layer, has multiple horizontal and vertical lines defining columns and rows of cells, and multiple tabs each located in a cell along a center of a vertical border. The second mask, used to deposit a CIGS absorption layer, a window layer and a transparent contact layer, is similar to the first mask except the tabs are located along the opposite vertical border of the cells. The third mask, used to deposit a metal grid layer, has multiple bus bar openings and finger openings. Each bus bar opening is located along a horizontal center line of a cell and overlaps the second tab of a neighboring cell. The cells in a horizontal row are connected in series, forming a linear solar receiver.
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