Patent ID: 11916159
Assignee: SOLAERO TECHNOLOGIES CORP
Field: Semiconductors (Electrical engineering)
Classification: CPC H  C  Y | IPC H

Claim 0:
1. A method of fabricating a multijunction solar cell comprising:
forming a first solar subcell, having an emitter layer and a base layer which form a photoelectric junction; and
forming a second solar subcell disposed below and adjacent to said first solar subcell, having an emitter layer and a base layer which form a photoelectric junction; and
wherein the base layer and the emitter layer of at least a particular solar subcell from among the first solar subcell and the second solar subcell has a graded band gap throughout at least a portion of a thickness of the emitter layer or the base layer in a first region in the emitter layer adjacent to the photoelectric junction, and throughout at least a portion of a thickness of its base layer in a second region spaced apart from the first region and adjacent to the junction, with the band gap in the first region and the band gap in the second region being in the range of 20 to 300 meV greater than the band gap away from the photoelectric junction in the emitter layer or the base layer in the at least the particular subcell.