Tohoku Univ./ Yamanashi Univ. Technology：New Sulfidation Technology, n-Type SnS Thin Films and Solar Cells： T20-154
・ Safe, Low-Temp, and Impurity-Free Sulfurization Technology ・ Innovative n-Type SnS Thin Films for Next-Gen Solar Cells
Thin-film solar cells using SnS (tin sulfide) offer the following advantages: ・Free of toxic elements such as Cd and Te. ・Composed of abundant and inexpensive elements (Sn and S). ・Efficient light absorption at a thickness of just 2–3 μm (compared to ~500 μm for silicon). ・A conversion efficiency of 25.3% has been reported for homo p-n junctions. However, achieving high-efficiency SnS solar cells with a homo p-n junction requires n-type SnS thin films, which have been technically challenging to fabricate. In this invention, inventor successfully synthesized n-type SnS thin films for the first time using a novel sulfurization technique based on sulfur plasma. This breakthrough is expected to enable the realization of homojunction SnS solar cells in the future.
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The revenue generated from technology transfer is reinvested into universities and researchers as new research funding, which is used to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will actively promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by concluding 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 - Showa Medical University
