Sakata Inx & Sofab Develop Inkjet-Printable ETL Ink for Perovskite Solar Cells

Sakata Inx Corporation and Sofab Inks, a U.S.-based developer of materials for perovskite solar cells, are collaborating to develop a specialized inkjet-printable ink for the electron transport layer (ETL) of perovskite solar cells. 

The partnership combines the companies’ expertise in advanced materials and inkjet technologies to enable more precise, efficient production processes for next-generation solar technology.

This development combines Sofab’s high-performance tin oxide (SnO₂)-based ETL materials with Sakata Inx’s nano-dispersion, ink formulation, and thin-film formation technologies cultivated through its industrial inkjet ink business. 

By integrating Sofab’s materials technology with Sakata Inx’s inkjet technology, the companies aim to establish a precise and efficient inkjet deposition process.

The ETL inkjet ink currently under development is designed with consideration for reducing damage to the perovskite layer. It could support more precise material deposition, help reduce material waste, and contribute to improved durability and more efficient production processes. 

The technology can be applied not only to single-junction perovskite solar cells but also to tandem perovskite solar cells, with potential applications in markets worldwide.

Perovskite solar cells’ lightweight and thin-film properties are expected to enable a wide range of applications, including building materials, windows, and automobiles. 

The two companies plan to present information about the product under development at the Sofab booth during the Perovskite Connect Conference, to be held in Berlin, Germany, on October 21 and 22, 2026.