公开(公告)号：US20220238742A1

公开(公告)日：2022-07-28

申请号：US17667194

申请日：2022-02-08

Applicant: John Hart ,  Daniel Derkacs ,  Zachary Bittner ,  Andrew Colin Espenlaub

Inventor： John Hart ,  Daniel Derkacs ,  Zachary Bittner ,  Andrew Colin Espenlaub

IPC: H01L31/0725 ,  H01L31/18 ,  H01L31/0735 ,  H01L31/065

Abstract: A multijunction solar cell including an upper first solar subcell having a first band gap and positioned for receiving an incoming light beam; and a second solar subcell disposed below and adjacent to and lattice matched with said upper first solar subcell, and having a second band gap smaller than said first band gap; wherein at least one of the solar subcells has a graded band gap throughout the thickness of at least a portion of its emitter layer and base layer.