| 摘要 |
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 subcell having a second band gap smaller than the first band gap; forming a grading interlayer over the second subcell having a third band gap larger than the second band gap; forming a third solar subcell having a fourth band gap smaller than the second band gap such that the third subcell is lattice mis-matched with respect to the second subcell; and etching a via from the top of the third subcell to the substrate to enable both anode and cathode contacts to be placed on the backside of the solar cell. |
