Low-Cost, High-Efficiency III-V Photovoltaics Enabled by Remote Epitaxy Through Graphene

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This project will develop low-cost, high-throughput, and high-efficiency multijunction photovoltaics (PV) by leveraging remote epitaxy and a 2-dimensional layer transfer process that uses hybrid vapor phase epitaxy (HVPE). This manufacturing method allows the growth of defect-free single-crystalline films that can be easily separated from the substrate. The substrate, which is expensive, can be infinitely reused by copying the crystalline information from the substrate through graphene. To validate the feasibility of this method, tandem PV cells will be grown and characterized to achieve maximum power conversion efficiency levels. In addition, the HVPE technique will enable high-throughput epitaxy at low costs, helping to produce PV cells at manufacturing scale.