THIN-FILM SOLAR CELL HAVING A MOLYBDENUM-CONTAINING BACK ELECTRODE LAYER
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Dec 16, 2008
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Dec 18, 2007
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Abstract
A thin-film solar cell has a rear electrode layer formed of at least 50 atom % of Mo, which in addition to the common contaminants includes 0.1 to 45 atom % of at least one element from the group of Ti, Zr, Hf, V, Nb, Ta, and W, 0 to 7.5 atom % of Na, and 0 to 7.5 atom % of at least one element forming a compound with Na that has a melting point >500 C. The rear electrode layer has good long-term resistance and bonding with the CIGS absorber layer. In addition, the constancy of the alkali metal integration in the absorber layer is improved.
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