Oxford PV, a global pioneer in perovskite photovoltaic innovation, is advancing the performance limits of solar power generation through its proprietary perovskite-on-silicon tandem solar cell technology. By integrating a high-bandgap perovskite top cell with an industry-standard silicon bottom cell, the company is enabling a step-change in photovoltaic efficiency beyond the theoretical limits of conventional silicon-only solar modules.
Conventional crystalline silicon solar cells are fundamentally constrained by single-junction physics, which limits the amount of the solar spectrum that can be efficiently converted into electrical energy. Oxford PV’s tandem architecture overcomes this limitation by stacking two complementary absorber materials with optimized band gaps. The perovskite top cell efficiently converts high-energy photons in the visible spectrum, while the silicon bottom cell captures lower-energy photons in the near-infrared range. This spectral splitting approach significantly increases total energy conversion efficiency without increasing module footprint.
The perovskite materials used by Oxford PV are engineered for high optical absorption, low defect density, and tunable electronic properties. Through precise compositional control, the perovskite bandgap is optimized to maximize tandem performance while maintaining long-term operational stability. These thin-film perovskite layers are deposited directly onto silicon heterojunction (HJT) bottom cells using scalable, industry-compatible coating processes, enabling integration into existing photovoltaic manufacturing lines with minimal disruption.
At its manufacturing facility in Brandenburg an der Havel, Germany, Oxford PV has successfully transitioned this tandem cell architecture from laboratory-scale research to commercial production. The process flow combines mature silicon cell fabrication with advanced thin-film deposition, interconnection, and module encapsulation techniques. The result is a high-performance tandem module that delivers significantly higher power output per square meter compared with today’s mainstream silicon modules.
Oxford PV’s commercial tandem solar modules have already demonstrated module efficiencies exceeding 25 percent, representing an improvement of approximately 20 percent in energy yield relative to standard silicon technologies. This higher power density translates directly into reduced balance-of-system costs, lower land usage, and improved economics for utility-scale solar installations. In space-constrained applications such as rooftop solar, building-integrated photovoltaics (BIPV), and electric vehicle charging infrastructure, the efficiency gains enable greater energy generation from the same installed area.
The company’s technology roadmap targets continued performance improvements, with near-term development milestones exceeding 27 percent module efficiency and longer-term goals approaching 30 percent. These advancements are expected to play a critical role in reducing the levelized cost of electricity (LCOE) and accelerating the global transition to low-carbon energy systems.
By combining high efficiency, scalable manufacturing, and compatibility with established silicon supply chains, Oxford PV’s tandem technology is positioned to serve a broad range of markets, including utility-scale solar power plants, commercial and residential installations, and emerging high-efficiency energy applications.
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About Oxford PV
Oxford PV was founded in 2010 as a spin-out from the University of Oxford and is widely recognized as a pioneer in perovskite solar cell technology. The company has built one of the most comprehensive intellectual property portfolios in the perovskite photovoltaic sector and has consistently set world-record efficiency milestones for perovskite-based devices. Oxford PV is focused on accelerating the industrial adoption of perovskite-on-silicon tandem solar technology.
