Tokyo Chemical Industry (TCI), a global supplier of laboratory chemicals and specialty materials, is offering BrNH3-4PACz materials, an SAM-forming agent, that can be used as a replacement for PEDOT/PSS in tandem perovskite solar cells.
TCI explains that in a tandem perovskite solar cell architecture, a wide-bandgap (WBG) Pb-PSC (the top cell) is placed on top of a narrow-bandgap (NBG) Pb/Sn-PSC (the bottom cell). In NBG-type PSCs, the PEDOT/PSS (HTL) material has a drawback in that it oxidizes Sn2+ Therefore, in the fabrication of PSCs containing Sn (including NBG-type PSCs), it is considered desirable to replace PEDOT/PSS with a self-assembled monolayer (SAM)-forming agent. This has been shown in several research papers, including this 2025 one.
TCI is offering its high quality PACz series, including BrNH3-4PACz, specifically for this application. These materials are covered by a joint patent pending (PCT/EP2019/060586) of Helmholtz Zentrum Berlin für Materialien und Energie GmbH, Germany and Kaunas University of Technology, Lithuania. TCI has been granted the right to manufacture and sell these materials.
Tokyo Chemical Industry offers a wide range of materials for the perovskite industry, including perovskite precursors, high-performance hole collecting materials, Phenylethylamine Hydroiodides materials, Zinc compounds, PACz as p-type SAM forming agents, PDINN materials, SMORI passivation materials, PANDI as an n-type SAM forming agents, Spiro-OMeTAD hole transporting materials, and more. We published an interview with TCI in 2022 to discuss their perovskite materials and views on the industry and market.
This was a sponsored post by TCI