Patent ID: 8686284

Claim:
A photovoltaic device, comprising: a p + -doped AlGaAs layer, wherein recesses are formed in the p + -doped AlGaAs layer such that the recesses extend through the p + -doped AlGaAs layer; a n-doped GaAs layer directly adjacent to the p + -doped AlGaAs layer, wherein the n-doped GaAs layer and p + -doped AlGaAs layer form a p-n heterojunction such that electric energy is created when light is absorbed by the p-n heterojunction; an interface layer comprising a Group III-V compound semiconductor above the p + -doped AlGaAs layer; a diffuser above the p + -doped AlGaAs layer, wherein the diffuser layer is covered with a reflective layer which provides for photons to be redirected through the diffuser layer and towards an interior of the photovoltaic device, wherein the diffuser layer and the interface layer are in direct contact with the p + -doped AlGaAs layer, wherein the diffuser layer is found in direct contact with a first side of the interface layer and in direct contact with a second side of the interface layer, and wherein the recesses in the p + -doped AlGaAs layer extend through the diffuser layer and the reflective layer; a AlGaAs window layer below the n-doped GaAs layer; and an antireflective coating disposed below the AlGaAs window layer.