Patent ID: 8772628

Claim:
A method of fabricating a high bandgap GaInP photovoltaic converter, comprising: providing a crystalline growth structure having a growth surface that has a lattice constant which matches a relaxed lattice constant of a GaInP alloy that has a bandgap greater than that of Ga 0.51 In 0.49 P, wherein the crystalline growth structure comprises a graded GaAsP structure with a base surface having a lattice constant matching that of GaAs and where the growth surface comprises a GaAs 1-x P x alloy; growing a front contact layer on the growth surface; growing a GaInP photovoltaic cell on the front contact layer, the GaInP photovoltaic cell having a relaxed lattice constant matching the lattice constant of the growth surface; and growing a back contact layer on the GaInP photovoltaic cell.