Demounting of inverted metamorphic multijunction solar cells

Details Demounting of inverted metamorphic multijunction solar cells Demounting of inverted metamorphic multijunction solar cells

2010-06-15

2011-10-18

Chaudhari, Chandra (Department: 2891)

Semiconductor device manufacturing: process

Making device or circuit responsive to nonelectrical signal

Responsive to electromagnetic radiation

C438S459000, C257SE21125

Reexamination Certificate

active

08039291

ABSTRACT:
A method of forming a multijunction solar cell including an upper subcell, a middle subcell, and a lower subcell by providing a first substrate for the epitaxial growth of semiconductor material; forming a first solar subcell on the substrate having a first band gap; forming a second solar subcell over the first solar subcell having a second band gap smaller than the first band gap; forming a graded interlayer over the second subcell; forming a third solar subcell over the graded interlayer having a fourth band gap smaller than the second band gap such that the third subcell is lattice mismatched with respect to the second subcell; attaching a surrogate second substrate over the third solar subcell and removing the first substrate; and etching a first trough around the periphery of the solar cell to the surrogate second substrate so as to form a mesa structure on the surrogate second substrate and facilitate the removal of the solar cell from the surrogate second substrate.

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