Focusing on chemically and mechanically stable nanocarbon materials with minimal resource constraints, we will develop two-dimensional carbon-based transparent electrodes by enhancing the conductivity of carbon nanotube (CNT) thin films through chemical doping and by controlling their charge selectivity. In particular, we will address the challenging task of realizing n-type CNT electrodes through both experimental and theoretical approaches. Furthermore, through the chemical modification of fullerenes via organic synthesis, we will create vacuum-depositable fullerene derivatives exhibiting excellent thermal and morphological stability as well as high electron mobility. Based on these materials, we aim to develop CNT-based organic thin-film solar cells (CNT-OPVs), highly durable perovskite solar cells (CNT-PSCs), silicon/perovskite tandem solar cells, and next-generation organic photodiodes (OPDs), thereby establishing a new field of energy and organic electronics centered on nanocarbon materials.

Using CNT thin-film transparent electrodes as a core technology, we will advance the development of organic solar cells and perovskite solar cells. Through the implementation of highly conductive and highly durable CNT electrodes, we will enhance device performance and conduct demonstration experiments, aiming for the societal deployment of next-generation solar cells.

Research Leader	Miftakhul Huda, Designated Lecturer, Graduate School of Engineering, Nagoya University
Commercialization Leader	Tsuyoshi Hashimoto, Meijo Nano Carbon Co., Ltd.
Participating Organizations	Nagoya University; Chiba University; Meijo Nano Carbon Co., Ltd.; Clearize Co., Ltd.

For the widespread adoption of hydrogen energy in mountainous regions, polymer electrolyte fuel cells (PEFCs) capable of operating with low-cost, low-purity hydrogen derived from biomass and waste resources are highly effective. Currently, such hydrogen contains significant impurities such as CO and H₂S and remains largely unused. Purification to high purity accounts for approximately 50% of the production cost, making it expensive, while the use of unrefined hydrogen leads to severe degradation of fuel cell performance. To address this challenge, the development of anode catalysts with high tolerance to poisoning by impurities generated during reforming is essential.We have developed and demonstrated a poisoning-resistant catalyst composed of a carbon shell and a Pt-based core. Furthermore, we aim to elucidate the underlying mechanisms and enhance performance through database construction, machine learning, and synchrotron radiation analysis at Aichi Synchrotron Radiation Center. Through the deployment of PEFCs compatible with low-purity hydrogen, this project will accelerate the sustainable local production and consumption of hydrogen energy in regional areas.