Oxford PV, a spin-off from Oxford University, has advanced tandem perovskite solar cell technology that combines silicon and perovskite for higher efficiency. The company’s lab near Oxford, UK, has tested cell durability through impurity analysis, light response, and accelerated ageing simulations. Perovskite materials were shown to absorb a wider light spectrum but remained vulnerable to heat, moisture, and lead-related concerns. In 2024, Oxford PV achieved a 26.9% efficiency record for residential modules and began manufacturing cells at its German plant. The company has supplied a 100 kW pilot batch to a US solar farm for real-world testing. Other developers, including Swift Solar, Caelux, Trinasolar and Longi, have pursued similar innovations. Researchers said long-term reliability remains crucial, with future uses possible in electric vehicles and satellites.