2022 Fiscal Year Final Research Report
Basic study for application of narrow gap oxide semiconductors with zinc blende structure
Project/Area Number |
19K05008
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 26020:Inorganic materials and properties-related
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Research Institution | National Institute of Technology, Toyama College |
Principal Investigator |
Kita Masao 富山高等専門学校, その他部局等, 准教授 (00413758)
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Project Period (FY) |
2019-04-01 – 2023-03-31
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Keywords | 酸化物半導体 / 閃亜鉛鉱型関連構造 / ナローバンドギャップ / ミストCVD |
Outline of Final Research Achievements |
Using an energy-saving and low-cost mist CVD method, which is a non-vaccum process, we succeeded in depositing Cu3VO4 thin films with a zinc blende (cubic diamond)-related structure, which is rare in oxides. Hall effect measurements confirmed p-type conduction in the non-doped Cu3VO4 thin film. The band gap of the Cu3VO4 thin film estimated from the optical absorption spectrum is 1.2 eV, which is suitable as a light-absorbing layer for single-junction solar cells.
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Free Research Field |
無機材料
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Academic Significance and Societal Importance of the Research Achievements |
バンドギャップが太陽電池材料に適していない材料が多い酸化物半導体は,これまで太陽電池の光吸収層としてあまり利用されてこなかった.本研究課題では,Cu3VO4の電気的・光学的性質を明らかにし,Cu3VO4が太陽電池材料として有望な材料であることを明らかにした.本研究の成果によって化学的安定性の高い酸化半導体がワイドギャップな領域だけでなく可視・赤外領域でも有用であることを検証できたことは、学術的にも社会的にも大きな意義がある.
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