Sofab Inks
Sofab Inks Inc. is a global leader in perovskite materials development, founded by a team of leading perovskite scientists. The company develops high-performance charge transport materials for next-generation perovskite solar cells, including its flagship solvent-based tin oxide (SnOx) nanoparticle ink.
Sofab’s inorganic transport materials are designed to replace conventional organic layers, enabling higher efficiency, improved stability, and lower manufacturing costs while remaining compatible with scalable coating techniques such as slot-die coating.
Contact information for Sofab Inks
11351 Decimal Drive
Louisville, KY 40299
United States
Halocell Energy Integrates Sofab Inks’ Advanced Metal Oxide Materials into Perovskite Photovoltaic Modules
Halocell Energy and Sofab Inks have announced breakthrough results from their ongoing collaboration to advance scalable perovskite photovoltaic (PV) modules.
Building on the strategic partnership announced in 2025, Halocell has successfully integrated Sofab Inks’ proprietary metal oxide nanoparticle inks as a charge transport layer in its module architecture. This integration aligns with Halocell’s roll-to-roll manufacturing approach, enabling continuous, low-cost production of thin, lightweight, and flexible perovskite PV modules.
Sofab Inks secures lead investor for $6 million seed round
Sofab Inks has announced that it has signed a term sheet for a $6 million seed round led by Cloudberry Ventures, a UK-based deep tech venture firm known for backing “DeepTech breakthroughs defining the next decade".
Cloudberry Ventures will lead the round with an initial $2 million investment, marking a significant milestone in Sofab Inks’ growth journey. The company noted that the full $6 million round is not yet complete, with additional funding expected from existing and new investors in the coming months.
Sofab Inks and APS demonstrate 22.2% fullerene-free perovskite module on 30×30 cm slot-die platform
Sofab Inks and Alpha Precision Systems (APS) have reported a 22.2% power conversion efficiency on a 30 × 30 cm perovskite solar module using a fullerene-free PIN architecture and slot-die coating. The result illustrates a potential pathway to narrow the gap between laboratory-scale device performance and production-scale perovskite module manufacturing.
Sofab Inks was founded around Tinfab, a tin-oxide nanoparticle ink engineered to function as an electron transport layer deposited directly on perovskite absorbers. Tinfab enables fullerene-free PIN device architectures and is designed for compatibility with scalable coating processes such as slot-die coating. In earlier work on flexible substrates, the Sofab team reported a champion device efficiency of 20.41%, demonstrating the material’s potential at lab scale.
Sofab Inks reports progress in perovskite solar technology and commercial adoption
Sofab Inks has shared details of its progress over the past year, highlighting technical milestones and commercial validation across its perovskite-based solar materials.
In 2025, the company achieved a record efficiency of 22.2% on a 30 cm × 30 cm fullerene-free PIN perovskite solar module, produced in collaboration with Alpha Precision Systems Inc using Sofab’s Tinfab electron transport layer. This result demonstrates the potential for extending laboratory-scale performance to production-scale modules.
Alpha Precision Systems achieves 22.2% PCE using Sofab Inks' ETL
Alpha Precision Systems has achieved an impressive 22.2% power conversion efficiency on a large 30 × 30 cm perovskite solar panel using Sofab Inks' TinFab ETL, in a completely fullerene-free PIN architecture.
This is one of the highest and largest-format fullerene-free perovskite modules reported to date, underscoring both the scalability and performance potential of inorganic ETLs such as TinFab for next-generation solar module manufacturing.
