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InGaAs Solar Cells Grown on Wafer-Bonded InP/Si Epitaxial Templates

  • James M. Zahler (a1), Katsuaki Tanabe (a2), Corinne Ladous (a3), Tom Pinnington (a4), Frederick D. Newman (a5) and Harry A. Atwater (a6)...

Abstract

InP/Si engineered substrates formed by wafer bonding and layer transfer have the potential to significantly reduce the cost and weight of III-V compound semiconductor solar cells. InP/Si substrates were prepared by He implantation of InP prior to bonding to a thermally oxidized Si substrate and annealing to exfoliate an InP thin film. Following thinning to remove damage caused by the implantation and exfoliation from the surface of the InP transferred film, InGaAs solar cells lattice-matched to bulk InP were grown on those substrates using metal-organic chemical vapor deposition. The photovoltaic current-voltage characteristics of the InGaAs cells fabricated on the wafer-bonded InP/Si substrates were comparable to those synthesized on commercially available epi-ready InP substrates, thus providing an initial demonstration of wafer-bonded InP/Si substrates as an alternative to bulk InP substrates for solar cell applications.

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Keywords

InGaAs Solar Cells Grown on Wafer-Bonded InP/Si Epitaxial Templates

  • James M. Zahler (a1), Katsuaki Tanabe (a2), Corinne Ladous (a3), Tom Pinnington (a4), Frederick D. Newman (a5) and Harry A. Atwater (a6)...

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