TANDEM SOLAR CELL STRUCTURES AND METHODS OF MANUFACTURING SAME
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United States of America Patent
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app pub date -
Jul 25, 2007
filing date -
Jul 25, 2006
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Abstract
The present invention relates to thin film solar cell structures and methods of manufacturing them, particularly tandem cell structures and components thereof. In one aspect there is provided a polycrystalline thin film solar cell structure that is semi-transparent and allows a predetermined wavelength range of light to pass therethrough, in which a bottom semi-transparent conductive layer includes at least one of a ruthenium oxide, an osmium oxide and an iridium oxide. In another aspect there is provided a tandem cell structure in which a top cell bottom contact layer includes at least one of a ruthenium oxide, an osmium oxide and an iridium oxide. In a preferred aspect, the tandem cell structure contains a single contact layer between the absorber layer of the top cell and the absorber layer of the bottom cell. In a particular aspect, this single contact layer is a ruthenium oxide layer.
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