BACK-SURFACE ELECTRODE FOR COMPOUND SEMICONDUCTOR THIN-FILM SOLAR BATTERY, SOLAR BATTERY, AND SPUTTERING TARGET FOR MANUFACTURING THE BACK-SURFACE ELECTRODE

摘要

PROBLEM TO BE SOLVED: To provide a novel material which has a low electric resistance even after a high-heat history of approximately 450 to 500°C and is appropriate for a back-surface electrode for a compound semiconductor thin-film solar battery excellent in adhesion property with a substrate.

SOLUTION: There is provided a back-surface electrode used in a solar battery including a light absorption layer formed of a compound semiconductor thin film on a substrate. The back-surface electrode has a configuration in which a Cu alloy and Mo are stacked in this order from the substrate side. The Cu alloy should preferably contain 0.5-10 atom% of Al and/or 1.0-10 atom% of Ti.

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