Patent ID: 9543456
Date: 2017-01-10
CPC Classifications: G02B,H01L,Y02E

Claim:
1. A solar cell device comprising: a subcell-based structure that includes a topmost subcell; and a broadband, step-graded antireflection structure located above the topmost subcell, the antireflection structure comprising a plurality of deposited layers of discrete materials comprising: a layer of approximately 70 nm of AlInGaP having an index of refraction of approximately 3.3, a layer of approximately 90 nm of AlInP having an index of refraction of approximately 3.0, a layer of approximately 100 nm of TiO a layer of approximately 120 nm of TiO a layer of approximately 125 nm of TiO a layer of approximately 365 nm of porous SiO