Patent ID: 7872252

Claim:
A semiconductor device comprising: a p-type germanium layer; a nucleating layer formed on the germanium layer, the nucleating layer including a III-V compound selected from the group consisting of AlAs, AlSb, AlN, BAs, BSb, GaN, GaSb, and InAs; and a first III-V compound layer formed on the nucleating layer, the first III/V compound layer including at least one of GaInP, AlInP, and AlGaInP, the p-type germanium layer having diffused therein phosphorous atoms from the first III-V compound layer, a concentration of the phosphorous atoms diffused in the p-type germanium layer being a function of a thickness of the nucleating layer, the first III-V compound layer having diffused therein germanium atoms from the p-type germanium layer, a concentration of the germanium atoms diffused in the first III-V compound layer being a function of the thickness of the nucleating layer, the semiconductor device having a morphology that is substantially defect-free.