Defect control in p-type oxide semiconductor for device application

• Project/Area Number: 21686061
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Inorganic materials/Physical properties
• Research Institution: University of Yamanashi
• Principal Investigator: YANAGI Hiroshi 山梨大学, 大学院・医学工学総合研究部, 准教授 (30361794)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥28,080,000 (Direct Cost: ¥21,600,000、Indirect Cost: ¥6,480,000); Fiscal Year 2011: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2009: ¥24,310,000 (Direct Cost: ¥18,700,000、Indirect Cost: ¥5,610,000)
• Keywords: p型酸化物半導体 / 価数制御 / 界面制御 / 光電子分光

Research Abstract

Cu valency at the Cu_2O film surface and Cu_2O/Al_2O_x interface were studied by X-ray photoelectron spectroscopy. We revealed that Cu valency at the interfaces is always Cu^<2+> and this result was not affected by deposition order. We also revealed that vacuum annealing was effective to reduce Cu^<2+> to Cu^+at the interface, but it does not work when thick film was deposited on the interface.

Research Products

• [Journal Article] Photovoltaic properties of n-type amorphous In-Ga-Zn-O and p-typesingle crystal Si heterojunction solarcells : Effects of Ga content (2012)
  • Author(s): Kyeongmi Lee, Kenji Nomura, Hiroshi Yanagi, Toshio Kamiya, Hideo Hosono
  • Journal Title: Thin SolidFilms Volume: 520 Pages: 3808-3812
  • Peer Reviewed
• [Journal Article] Electron injection barriers between air-stable electride with low work function, C12A7 : e^-, and pentacene, C60 and copper phthalocyanine (2012)
  • Author(s): Hiroshi Yanagi, Toshifumi Kuroda, Ki-Beom Kim, Yoshitake Toda, Toshio Kamiya, Hideo Hosono
  • Journal Title: J. Mater. Chem Volume: 22 Pages: 4278-4281
  • Peer Reviewed
• [Journal Article] Electronic Structure and Photovoltaic Properties of n-Type Amorphous In-Ga-Zn-O and p^-Type Single Crystal Si Heterojunctions (2011)
  • Author(s): Kyeongmi Lee, Kenji Nomura, Hiroshi Yanagi, Toshio Kamiya, Hideo Hosono
  • Journal Title: Electrochemical and Solid-State Letter Volume: 14
  • Peer Reviewed
• [Journal Article] Depth analysis of subgap electronic states in amorphous oxide semiconductor, a-In-Ga-Zn-O, studied by hard x^-ay photoelectron spectroscopy (2011)
  • Author(s): Kenji Nomura, Toshio Kamiya, EijiI kenaga, Hiroshi Yanagi, Keisuke Kobayashi, Hideo Hosono
  • Journal Title: Journal of Applied Physics Volume: 109 Pages: 73726-73726
  • Peer Reviewed
• [Journal Article] Electrical and magnetic properties of quaternary compounds LnMnPO(Ln=Nd, Sm, Gd) with ZrCuSiAs-type structure (2010)
  • Author(s): Hiroshi Yanagi, Katsutoshi Fukuma, Toshio Kamiya, Masahiro Hirano, Hideo Hosono
  • Journal Title: Materials Science and Engineering B Volume: 173 Pages: 47-50
  • Peer Reviewed
• [Presentation] Low-temperature deposition of high mobility Cu_2O thin films for a-IGZO/Cu_2O heterojunction solar cell (2012)
  • Author(s): H. Yanagi, K. Lee, K. Nomura, T. Kamiya, and H. Hosono
  • Organizer: International Symposium on Innovative Solar Cells 2012
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2012-03-05
• [Presentation] Cu_2O/Al_2O_x界面作製時におけるCuの価数変化 (2011)
  • Author(s): 吉原理紗,柳博
  • Organizer: 日本セラミックス協会第24回秋季シンポジウム
  • Place of Presentation: 札幌
  • Year and Date: 2011-09-07
• [Presentation] Cu_2O/Al_2O_x界面作製時におけるCuの価数変化 (2011)
  • Author(s): 吉原理紗
  • Organizer: 日本セラミックス協会秋季シンポジウム
  • Place of Presentation: 札幌
  • Year and Date: 2011-09-07
• [Presentation] Growh of Highly-Oriented, High Mobility Cu_2O for Heterojunction Amorphous-IGZO/Cu_2O Solar Cell (2011)
  • Author(s): Kyeongmi Lee, Kenji Nomura, Hiroshi Yanagi, Toshio Kamiya, and Hideo Hosono
  • Organizer: 24th International Conference on Amorphous and Nanocrystalline Semiconductors : ICANS24
  • Place of Presentation: Nara, Japan
  • Year and Date: 2011-08-25
• [Presentation] Electronic Structures of p-type Cu_2O and Delafossite-Type Oxides Studied by Photoelectron Spectroscopy (2011)
  • Author(s): Hiroshi Yanagi, Risa Yoshihara, Nobuhito Takagi, Toshio Kamiya, and Hideo Hosono
  • Organizer: 5th International Symposium on Science and Technology of Advanced Ceramics : STAC-5
  • Place of Presentation: Yokohama, Japan
  • Year and Date: 2011-06-24
• [Presentation] Electronic Structures of p-type Cu_2O and Delafossite-Type Oxides Studied by Photoelectron Spectroscopy (2011)
  • Author(s): Hiroshi Yanagi
  • Organizer: STAC-5
  • Place of Presentation: Yokohama
  • Year and Date: 2011-06-24
• [Presentation] Photoelectron Spectroscopic Study of Cu_2O/Al_2O_X Interface (2011)
  • Author(s): R. Yoshihara, and H. Yanagi
  • Organizer: 5th International Symposium on Scienceand Technology of Advanced Ceramics : STAC-5
  • Place of Presentation: Yokohama, Japan
  • Year and Date: 2011-06-22
• [Presentation] Photoelectron Spectroscopic Study of Cu_2O/Al_2O_x Interface (2011)
  • Author(s): Risa Yoshihara
  • Organizer: STAC-5
  • Place of Presentation: Yokohama
  • Year and Date: 2011-06-22
• [Presentation] Photovoltaic properties ofn-type a-In-Ga-Zn-O/p-type c-Si heterojunction solar cells (2011)
  • Author(s): Kyeongmi Lee, Kenji Nomura, Hiroshi Yanagi, Toshio Kamiya, and Hideo Hosono
  • Organizer: on Transparent Oxide Thin Films for Electronics and Optics : TOEO-7
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2011-04-15
• [Presentation] n型a-In-Ga-Zn-Op型c-Siヘテロ接合型太陽電池の発電特性 (2010)
  • Author(s): Kyeongmi Lee,野村研二,柳博,神谷利夫,細野秀雄
  • Organizer: 第71回応用物理学会学術講演会
  • Place of Presentation: 長崎
  • Year and Date: 2010-09-16
• [Presentation] Energy Band Alignment and Energy Structure of Transparent Conducting Materials (2010)
  • Author(s): H. Yanagi, K. Nomura, H. Hiramatsu, Y. Toda, T. Kamiya, H. Hosono
  • Organizer: 2010 Taiwan-Japan Bilateral Technology Interchange Project Workshop on Transparent Conductive Oxide Thin Films for Electronics and Optics in Green Energy
  • Place of Presentation: Hsinchu, Taiwan
  • Year and Date: 2010-08-18
• [Presentation] Band Alignment and Energy Structure of Transparent Conducting Materials (2010)
  • Author(s): Hiroshi Yanagi
  • Organizer: 2010 Taiwan-Japan Bilateral Technology Interchange Project Workshop on Transparent Conductive Oxide Thin Films for Electronics and Optics in Green Energy
  • Place of Presentation: Hsinchu, Taiwan
  • Year and Date: 2010-08-18
• [Presentation] Electronic Structures and EnergyBand Lineup of TransparentConducting Materials Studied byPhotoelectron Spectroscopy (2010)
  • Author(s): H. Yanagi, K. Nomura, H. Hiramatsu, Y. Toda, T. Kamiya, H. Hosono
  • Organizer: 5thForum on New Materials, CIMTEC2010
  • Place of Presentation: Montecatini Terme, Italy
  • Year and Date: 2010-06-17
• [Presentation] Electronic Structures and Energy Band Lineup of Transparent Conducting Materials Studied by Photoelectron Spectroscopy (2010)
  • Author(s): Hiroshi Yanagi
  • Organizer: CIMTEC 2010, 5th Forum on New Materials
  • Place of Presentation: Montecatini Terme, Italy
  • Year and Date: 2010-06-17
• [Presentation] Cu_<2-x> Se : High-efficienthole injection electrode for organic semiconductors (2009)
  • Author(s): Hiroshi Yanagi, Ikue Koizumi, Ki-Beom Kim, Hidenori Hiramatsu, Toshio Kamiya, Masahiro Hirano, Hideo Hosono
  • Organizer: The Third International Conference on the Characterization and Control of Interfaces for High Quality Advanced Materials, and Joining Technology for New Metallic Glasses and Inorganic Materials
  • Place of Presentation: Kurashiki, Japan
  • Year and Date: 2009-09-09
• [Presentation] 光電子分光法によるCu_2O/酸化物絶縁体界面の電子状態の観察 (2009)
  • Author(s): 柳博, Shunyi Li, Andre Wachau,松崎功佑,神谷利夫, Andreas Klein,細野秀雄
  • Organizer: 第70回応用物理学会学術講演会
  • Place of Presentation: 富山
  • Year and Date: 2009-09-09
• [Presentation] 光電子分光法によるCu_2O/酸化物絶縁体界面の電子状態の観察 (2009)
  • Author(s): 柳博
  • Organizer: 第70回 応用物理学会学術講演会
  • Place of Presentation: 富山大学(富山)
  • Year and Date: 2009-09-09
• [Presentation] Application of HAXPES to New Transparent Oxide Semiconductors : Transparent Amorphous Oxide Semiconductors & Room Temperature Stable Electride (2009)
  • Author(s): Hiroshi Yanagi
  • Organizer: International Workshop for New Opportunities in Hard X-ray Photoelectron Spectroscopy : HAXPES 2009
  • Place of Presentation: NY, USA
  • Year and Date: 2009-05-21
• [Remarks]
  • URL: http://www.ab11.yamanashi.ac.jp/apchem/
• [Remarks]
  • URL: http://www.ab11.yamanashi.ac.jp/apchem/index.shtml