About Us

Group 4 Photovoltaics (G4PV) is a Swiss deep-tech spin-off from EPFL / EPFL-Valais. It builds on many years of pioneering research in perovskite solar cells, with the support of Prof. Mohammad Khaja Nazeeruddin and Prof. Paul Dyson, two internationally recognized leaders in perovskite photovoltaics.

◆ Sustainable by Design: Perovskite solar cells use elements from Group IV of the periodic table to convert sunlight into electricity. At end of life, these elements can be recovered and recycled, which supports a truly circular photovoltaic value chain.

◆ AI for Science: We build high-quality, expert-curated datasets for AI training, including RLHF and HLE-style benchmarks, in physics, chemistry, and materials science. This helps AI models reason like domain experts.

◆ Advanced Perovskite Materials: We develop and prepare key functional materials, including charge-transport materials, interfacial materials, and precursors for device preparation, for high-efficiency and stable perovskite devices.

◆ Flexible Devices: We develop lightweight, flexible perovskite devices for emerging applications where conventional rigid PV cannot go, from wearables and portable electronics to space. With a high power-to-weight ratio and strong radiation tolerance, perovskite technology is a promising power source for satellites and other space missions.

◆ Custom Services: We offer tailored research, materials and technical services to companies, universities, and non-profit institutions, from feasibility studies to customized material solutions.