Development of electroactive materials through the analysis of electronic phase diagrams of epitaxial transition-metal oxides
| Project/Area Number |
15H03881
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Device related chemistry
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
OHTOMO Akira 東京工業大学, 物質理工学院, 教授 (10344722)
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| Co-Investigator(Renkei-kenkyūsha) |
MATSUMOTO Yuji 東北大学, 工学研究科, 教授 (60302981)
KUMIGASHIRA Hiroshi 高エネルギー加速器研究機構, 物質構造科学研究所, 教授 (00345092)
YOSHIMATSU Kohei 東京工業大学, 物質理工学院, 助教 (30711030)
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| Research Collaborator |
MASHIKO Hisanori
NAKAMURA Kentaro
KUROKAWA Hikaru
SOMA Takuto
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥11,310,000 (Direct Cost: ¥8,700,000、Indirect Cost: ¥2,610,000)
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| Keywords | 薄膜・表面 / 超伝導 / 光触媒 / 遷移金属酸化物 / エピタキシャル成長 / 電気化学セル / 金属－絶縁体転移 / イオン結晶 / エピタキシャル / 電気化学 / 表面・界面物性 / 超伝導材料・量子 |
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| Outline of Final Research Achievements |
The transition-metal oxides, such as titania and hematite, are conventional materials utilized in various electrochemical cells because of their non-toxic, earth-abundant, and stable nature. This research aims at adding new electrochemical functionalities to them by combining the power of epitaxial growth techniques and newly developed phase-diagram analysis method. We implemented a compact electrochemical cell to test a number of thin-film samples. Representative achievements are summarized as follows: (i) band-gap narrowing in ferrite based films and orientation control of hematite films resulted in substantial improvement of visible-light driven photoelectrochemical water oxidations; (ii) complete and reversible superconductor-insulator transitions in lithium titanate films were achieved by Li-ion electrochemical reactions; (iii) superconductivity in higher titanium oxides films was discovered. Our approach is a powerful way to find new functionalities for sustainable society.
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Report
(4 results)
Research Products
(91 results)
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[Journal Article] Formation of indium-tin oxide ohmic contacts for β-Ga2O32016
Author(s)
T. Oshima, R. Wakabayashi, M. Hattori, A. Hashiguchi, N. Kawano, K. Sasaki, T. Masui, A. Kuramata, S. Yamakoshi, K. Yoshimatsu, A. Ohtomo, T. Oishi, M. Kasu
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Journal Title
Japanese Journal of Applied Physics
Volume: 55
Issue: 12
Pages: 1202B7-1202B7
DOI
NAID
Related Report
Peer Reviewed / Open Access
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[Journal Article] Epitaxial growth and electric properties of γ-Al2O3 (110) films on β-Ga2O3 (010) substrates2016
Author(s)
M. Hattori, T. Oshima, R. Wakabayashi, K. Yoshimatsu, K. Sasaki, T. Masui, A. Kuramata, S. Yamakoshi, K. Horiba, H. Kumigashira, A. Ohtomo
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Journal Title
Japanese Journal of Applied Physics
Volume: 55
Issue: 12
Pages: 1202B6-1202B6
DOI
NAID
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Presentation] β-Ga2O3用ITOオーミック電極2016
Author(s)
大島 孝仁, 若林 諒, 服部 真依, 橋口 明広, 河野 直人, 佐々木 公平, 増井 建和, 倉又 朗人, 山腰 茂伸, 吉松 公平, 大友 明, 大石 敏之, 嘉数 誠
Organizer
第77回応用物理学会秋季学術講演会
Place of Presentation
朱鷺メッセ (新潟県新潟市)
Year and Date
2016-09-13
Related Report
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[Presentation] ITO ohmic contacts for β-Ga2O32016
Author(s)
T. Oshima, R. Wakabayashi, M. Hattori, A. Hashiguchi, N. Kawano, K. Sasaki, T. Masui, A. Kuramata, S. Yamakoshi, K. Yoshimatsu, A. Ohtomo, T. Oishi, M. Kasu
Organizer
German-Japanese Gallium Oxide Technology Meeting 2016, Leibniz Institute for Crystal Growth
Place of Presentation
Berlin, Germany
Year and Date
2016-09-07
Related Report
Int'l Joint Research
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[Presentation] Evaluation of band offset at β-(AlxGa1-x)2O3/β-Ga2O3 heterointerface2015
Author(s)
Mai Hattori, Ryo Wakabayashi, Takayoshi Oshima, Kohei Sasaki, Takekazu Masui, Akito Kuramata, Shigenobu Yamakoshi, Hiroshi Horiba, Hiroshi Kumigashira, Kohei Yoshimatsu, Akira Ohtomo
Organizer
The 1st International Workshop on Gallium Oxide and Related Materials
Place of Presentation
京都大学桂キャンパス
Year and Date
2015-11-03
Related Report
Int'l Joint Research
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[Presentation] Strong fermi-level pinning at metal β-Ga2O3(-201) interface2015
Author(s)
Ryo Wakabayashi, Takayoshi Oshima, Mai Hattori, Kohei Sasaki, Takekazu Masui, Akito Kuramata, Shigenobu Yamakoshi, Kohei Yoshimatsu, Akira Ohtomo
Organizer
The 1st International Workshop on Gallium Oxide and Related Materials
Place of Presentation
京都大学桂キャンパス
Year and Date
2015-11-03
Related Report
Int'l Joint Research
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[Presentation] N-type doping of γ-Ga2O3 epitaxial films2015
Author(s)
Takayoshi Oshima, Keitaro Matsuyama, Kohei Yoshimatsu, Akira Ohtomo
Organizer
The 1st International Workshop on Gallium Oxide and Related Materials
Place of Presentation
京都大学桂キャンパス
Year and Date
2015-11-03
Related Report
Int'l Joint Research
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[Presentation] Type-I band alignment at β-(AlxGa1-x)2O3/β-Ga2O3 heterojunctionsβ-(AlxGa1-x)2O3/β-Ga2O32015
Author(s)
Takayoshi Oshima, Mai Hattori, Ryo Wakabayashi, Kohei Sasaki, Takekazu Masui, Akito Kuramata, Shigenobu Yamakoshi, Hiroshi Horiba, Hiroshi Kumigashira, Kohei Yoshimatsu, Akira Ohtomo
Organizer
The 34th Electronic Materials Symposium
Place of Presentation
ラフォーレ琵琶湖
Year and Date
2015-07-15
Related Report
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[Book] 固体材料の科学2015
Author(s)
Richard J. D. Tilley, 滝澤 博胤, 田中 勝久, 大友 明, 貝沼 亮介
Total Pages
300
Publisher
東京化学同人
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