Environmentally friendly materials for perovskite solar cells
Currently, most perovskite solar cells use lead (Pb)-based materials, but tin (Sn)-based alternatives are gaining attention for their environmental benefits and potential performance improvements. Sn offers higher light absorption efficiency without Pb, but challenges such as easy oxidation and the need for environmentally harmful organic solvents remain. To solve these issues, the inventor utilized ascorbic acid (AA) and found that adding it to a Sn aqueous solution greatly improves water solubility and prevents Sn oxidation. The precursor solution prepared using this method was mixed with MAI (methyl ammonium iodide) and coated onto a substrate, resulting in a highly oriented perovskite layer. This innovation paves the way for eco-friendly solar cells that use green processes, representing a major step toward sustainable energy solutions.
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The revenue generated from technology transfer is reinvested as new research funding for universities and researchers, and is utilized to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will vigorously promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by signing basic technology transfer agreements with the following universities (as of June 1, 2025): Tohoku University, Hirosaki University, Iwate University, Akita University, Fukushima University, Yamagata University, Tohoku Gakuin University, Iwate Medical University, Fukushima Medical University, Aizu University, Miyagi University, Hokkaido University, Muroran Institute of Technology, and Showa Medical University.
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