SOLAR CELL
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United States of America Patent
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Sep 15, 2017
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Mar 17, 2015
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A solar cell includes: a semiconductor substrate formed of n-type crystalline silicon; a first stack formed of amorphous silicon in a first region on a first principle surface of the semiconductor substrate; a second stack formed of amorphous silicon in a second region different from the first region on the first principle surface; and a third stack formed of amorphous silicon on a second principle surface of the semiconductor substrate opposite from the first principle surface. The second stack has an oxygen concentration that is higher than that of the first stack.
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