研究者業績

伊藤 省吾

イトウ セイゴ  (Seigo Ito)

基本情報

所属
兵庫県立大学 大学院工学研究科 教授

連絡先
itoueng.u-hyogo.ac.jp
通称等の別名
伊藤省吾
J-GLOBAL ID
201801013585894403
researchmap会員ID
B000347943

学歴
昭和63年 3月 兵庫県立神戸高校卒業
平成 7年 3月 京都大学工学部石油化学工学科卒業
平成 9年 3月 東京大学大学院工学研究科応用化学専攻修士課程修了
平成12年 3月 東京大学大学院工学研究科化学生命工学専攻博士課程単位取得中退
平成12年 9月 東京大学大学院工学研究科化学生命工学専攻博士(工学)学位取得


職歴
平成12年 4月 大阪大学ベンチャー・ビジネス・ラボラトリー中核的研究機関研究員
平成13年12月 関西学院大学理工学部博士研究員
平成14年 4月 (財)地球環境産業技術研究機構研究員
平成15年 2月 スイス連邦国立工科大学ローザンヌ校博士研究員
平成18年 9月 株式会社京セラ正社員
平成19年10月 兵庫県立大学 大学院工学研究科 電気系工学専攻准教授
平成27年 4月 兵庫県立大学 大学院工学研究科 材料・放射光工学専攻 准教授
平成29年 4月 兵庫県立大学 大学院工学研究科 材料・放射光工学専攻 教授

現在に至る

論文

 133
  • Lara Perrin, Emilie Planes, Takaya Shioki, Ryuki Tsuji, Jean‐Claude Honore, Cynthia Farha, Seigo Ito, Lionel Flandin
    Solar RRL 2024年7月24日  
    As perovskite photovoltaic devices can now compete with silicon technology in terms of efficiency, many strategies are investigated to improve their stability. In particular, degradation reactions can be hindered by appropriate device encapsulation, device architecture, and perovskite formulation. Mesoporous device architectures with a carbon electrode offer a plausible solution for the future commercialization of perovskite solar cells. They represent a low‐cost and stable solution with high potential for large‐scale production. Several studies have already demonstrated the potential of the mixed 2D/3D ammonium valeric acid iodide‐based MAPbI3 formulation to increase the lifetime of pure MAPbI3. They can however not describe the mechanisms responsible for the lifetime improvement. Using a full set of characterization techniques in the initial state and as a function of time during damp‐heat aging, new insights into the performance and degradation mechanisms may be observed. With (5‐AVA)0.05MA0.95PbI3, the solar cells are very stable up to 3500 h and the degradation of performances essentially results from the loss of electrical contacts mainly located at the interfaces. In contrast, for the neat MAPbI3, a poor stability is evidenced (T50 = 500 h) and the loss in performance results from the degradation of the bulk perovskite layer itself.
  • Ryuki Tsuji, Yuuma Nagano, Kota Oishi, Eiji Kobayashi, Seigo Ito
    2024年5月21日  
  • Takeshi Fukuda, Kenji Iimura, Takanori Yamamoto, Ryuki Tsuji, Maito Tanabe, Seiji Nakashima, Naoki Fukumuro, Seigo Ito
    Crystals 14(5) 462-462 2024年5月15日  
    Proton-exchange-membrane hydrogen fuel cells (PEMFCs) are an important energy device for achieving a sustainable hydrogen society. Carbon-based catalysts used in PEMFCs’ cathode can degrade significantly during operation-voltage shifts due to the carbon deterioration. The longer lifetime of the system is necessary for the further wide commercialization of PEMFCs. Therefore, carbon-free catalysts are required for PEMFCs. In this study, highly crystallized conducting Sb-doped SnO2 (Sb-SnO2) nanoparticles (smaller than 7 nm in size) were synthesized using an ozone-assisted hydrothermal synthesis. Pt nanoparticles were loaded on Sb-SnO2 supporting particles by polyol method to be “Pt/Sb-SnO2 catalyst”. The Pt/Sb-SnO2 catalyst showed a high oxygen reduction reaction (ORR) mass activity (178.3 A g−1-Pt @ 0.9 V), compared to Pt/C (149.3 A g−1-Pt @ 0.9 V). In addition, the retention ratio from the initial value of electrochemical surface area (ECSA) during 100,000-voltage cycles tests between 1.0 V and 1.5 V, Pt/SnO2 and Pt/Sb-SnO2 catalyst exhibited higher stability (90% and 80%), respectively, than that of Pt/C catalyst (47%). Therefore, the SnO2 and Sb-SnO2 nanoparticles synthesized using this new ozone-assisted hydrothermal method are promising as carbon-free catalyst supports for PEMFCs.
  • Takaya Shioki, Ryuki Tsuji, Kota Oishi, Naoki Fukumuro, Seigo Ito
    Photonics 11(3) 236-236 2024年3月5日  
    Fully printable carbon-based multiporous-layered-electrode perovskite solar cells (MPLE-PSCs) are easy to fabricate and have excellent durability. In this study, the porosity of the mesoporous TiO2 layer as the electron transport layer in MPLE-PSCs was controlled by varying the particle diameter of TiO2 nanoparticles from 14 nm to 98 nm. Furthermore, the results of absorbed photon-to-current conversion efficiency, visible light reflectance spectroscopy, pore-size distribution, X-ray diffraction, field emission scanning electron microscopy, and photovoltaic parameters of MPLE-PSCs are discussed. Although the porous TiO2 layer with smaller nanoparticles showed higher photoabsorption, it was found that the more voids of perovskite crystals created in the TiO2 porous layer, the smaller the particle size (<18 nm). The porous TiO2 layers with particles over 26 nm are well filled with perovskite crystals, resulting in a higher photovoltaic capacity with TiO2 particles over 26 nm. As a result, the short-circuit current density (JSC) showed a maximum value using 43 nm TiO2 particles, with an average power conversion efficiency (PCE) of 10.56 ± 1.42%. Moreover, the PCE showed a maximum value of 12.20% by using 26 nm TiO2 nanoparticles.
  • Naoyuki Shibayama, Shota Fukumoto, Hiroyuki Kanda, Takaya Shioki, Takeshi Fukuda, Yoshihiro Oka, Yuichi Haruyama, Satoru Suzuki, Seigo Ito
    Oxford Open Energy 3 2024年2月1日  
    Abstract The impact of NiOx layers on the performance of inverted perovskite solar cells (PSCs) has been investigated using multiple analysis methods (thermal gravimetric, differential thermal analysis, X-ray diffraction, X-ray photoelectron spectroscopy, and Soft X-ray photoelectron spectroscopy) of NiOx layers, which were made by spray pyrolysis deposition at different temperatures. The analyses of this study indicate that the efficiency of inverted PSC increases with the Scherrer crystallite size of NiOx. We also observed that the band state of the NiOx layer was changed by Na+ ions migrated from the glass substrate, which also had an impact on the efficiency. The results clearly showed that under high fabrication temperature, migration of matter from the substrate to the hole transport layer affects the electronic structure. Therefore, how these materials are engineered will be important to increase the efficiency of inverted PSCs.

MISC

 4

書籍等出版物

 3

講演・口頭発表等

 19

共同研究・競争的資金等の研究課題

 4