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BACK METAL LAYERS IN INVERTED METAMORPHIC MULTIJUNCTION SOLAR CELLS
BACK METAL LAYERS IN INVERTED METAMORPHIC MULTIJUNCTION SOLAR CELLS
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机译：倒相变质多结太阳能电池的背面金属层
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摘要
A multijunction solar cell comprising an upper first solar subcell having a first band gap; a middle second solar subcell adjacent to the first solar subcell and having a second band gap smaller than the first band gap, and having a base layer and an emitter layer; a graded interlayer adjacent to said second solar subcell, having a third band gap greater than the second band gap; a lower solar subcell adjacent to the grading interlayer, having a fourth band gap smaller than said second band gap such that the third subcell is lattice mismatched with respect to said second subcell; and a metal electrode layer deposited on said lower subcell and having a coefficient of thermal expansion substantially similar to that of the subcells.
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