RADIATION RESISTANT INVERTED METAMORPHIC MULTIJUNCTION SOLAR CELL
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United States of America Patent
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app pub date -
Jun 7, 2012
filing date -
Jun 7, 2012
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Abandoned
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Abstract
A multijunction solar cell including a first solar subcell having a first band gap and a first short-circuit current; a second solar subcell disposed over the first solar subcell and having a second band gap greater than the first band gap and a second short-circuit current greater than the first short-circuit current by an amount in the range of 2% to 6%; a third solar subcell disposed over the second solar subcell and having a third band gap greater than the second band gap and a third short-circuit current less than the first short-circuit current by an amount in the range of 2% to 6%; and a fourth solar subcell disposed over the third solar subcell having a fourth band gap greater than the third band gap, and a fourth short-circuit current less than the third short-circuit current by an amount in the range of 6% to 10%, so that at an “end of life” state of the multijunction solar cell in an AM0 space environment the short-circuit current of each of the subcells are substantially identical.
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