Creation of photoelectrochemical cell based on heterostructures of iron oxides

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H03563
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Thin film/Surface and interfacial physical properties
• Research Institution: The University of Tokyo
• Principal Investigator: Seki Munetoshi 東京大学, 大学院工学系研究科(工学部), 准教授 (40432439)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 酸化鉄薄膜 / 太陽光水分解

Outline of Final Research Achievements

Photoelectrodes of iron oxides were fabricated towards the high-efficiency solar water splitting. First we fabricated the photocathodes based on the wide gap semiconductor Si:FeO. We successfully suppress the partial oxidation of Fe ions at the surface of the electrode by depositing an insulating Ga2O3 layer on the Si:FeO. As a result, photocurrent was observed in the ultraviolet region in the Ga2O3/Si:FeO photocathode. Next, we fabricated Si:Fe2O3 photoelectrodes using a two-step pulsed laser deposition. The photocurrent was observed in the visible and near infrared regions which was further enhanced by the effect of localized surface plasmon. Moreover, we successfully fabricated V-substituted Fe2O3-based photoelectrodes which showed near infrared photocurrent and IPCE of approximately 11%.

Free Research Field

電子物性