Oxford PV and Fraunhofer ISE collaborate to develop perovskite-silicon tandem solar module with 25.6% efficiency using shingled design

Type: Partnership · Technology: Solar · Country: Germany · Announced: 2026-06-18

Oxford PV, a perovskite solar module manufacturer, announced a partnership with Germany’s Fraunhofer Institute for Solar Energy Systems (Fraunhofer ISE) to achieve a 25.6% power conversion efficiency for a perovskite-silicon tandem solar module using a shingled architecture. The collaboration combined Oxford PV’s tandem solar cells with Fraunhofer ISE’s Matrix Shingle module technology, which replaces traditional busbar-and-ribbon interconnections with a dense, overlapping cell layout to reduce resistive losses and improve resilience under partial shading. Fraunhofer ISE precision-cut Oxford PV’s solar cells into narrow strips and reconfigured them into a shingled pattern, bonded with electrically conductive adhesive to eliminate soldered interconnects and inactive spacing that blocks light. The resulting 491 W rooftop module (1.92 m²) and 546 W bifacial module (2.13 m²) both achieved 25.6% efficiency across the entire module area, demonstrating the technological synergy between tandem cells and shingle interconnection. The partnership leverages Oxford PV’s roadmap to exceed 30% efficiency, while Fraunhofer ISE’s Matrix Shingle approach enhances optical and electrical performance by increasing active photovoltaic area and reducing thermal stress during assembly.

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