Improvement of Thermoelectric Properties in Mg2Si by Strain State Control

• Project/Area Number: 26630304
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Inorganic materials/Physical properties
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: FUNAKUBO Hiroshi 東京工業大学, 総合理工学研究科(研究院), 教授 (90219080)
• Co-Investigator(Kenkyū-buntansha): AKIYAMA Kensuke 神奈川県産業技術センター, 研究員 (70426360)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: Mg2Si / 熱電測定 / 格子歪 / 熱電特性

Outline of Final Research Achievements

Effect of residual strain on the thermoelectric properties of Mg2Si films was investigated. Strain from 0.2% tensile to 0.4% compressive was successfully remained by changing the kinds of substrates. However, noticeable change was not detected.
Mg-Ca-Si films were also prepared. Films with Si excess composition showed n-type conduction, while films with other composition showed p-type conduction. Thermoelectric properties strongly depend on film composition. However Ca-substituted Mg2Si did not show any noticeable improvement of thermoelectric properties.

Research Products

• [Journal Article] Epitaxial Growth and Photoluminescence Properties of β-FeSi2 Grains Using Liquid Phase Obtained by Au-Si Eutectic Reaction (2016)
  • Author(s): Kensuke Akiyama and Hiroshi Funakubo
  • Journal Title: Proceedings of International Society for Optics and Photonics Volume: 9768 Pages: 97681Q-97681Q
  • DOI: 10.1117/12.2212057
  • Peer Reviewed / Open Access
• [Journal Article] Preparation of Ca-Si Films on (001) Al2O3 Substrates by an RF Magnetron Sputtering Method and Their Electrical Properties (2016)
  • Author(s): Mutsuo Uehara, Kensuke Akiyama, Takao Shimizu, Masaaki Matsushima, Hiroshi Uchida, Yoshisato Kimura, and Hiroshi Funakubo
  • Journal Title: J. Elector. Mater. Volume: - Issue: 6 Pages: 3121-3126
  • DOI: 10.1007/s11664-016-4404-x
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Photoluminescent Iron Disilicide on Modified Si Surface by Using Silver (2015)
  • Author(s): Kensuke Akiyama, Shinichi Motomura, Masaru Itakura, Yasuhiro Naganuma, and Hiroshi Funakubo
  • Journal Title: Jpn. J. Appl. Phys. Volume: 54 Issue: 7S2 Pages: 07JB04-07JB04
  • DOI: 10.7567/jjap.54.07jb04
  • NAID: 210000145471
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Structural characterization of epitaxial Mg2Si films grown on MgO and MgO-buffered Al2O3 substrates (2015)
  • Author(s): Atsuo Katagiri, Shota Ogawa, Takahiro Oikawa, Masaaki Matsushima, Kensuke Akiyama, P. S. Sankara Rama Krishnan, and Hiroshi Funakubo
  • Journal Title: Jpn. J. Appl. Phys. Volume: 54 Issue: 7S2 Pages: 07JC01-07JC01
  • DOI: 10.7567/jjap.54.07jc01
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Control of Iron Disilicide Crystal Structure by Using Liquid Phase Obtained by Au-Si Eutectic Reaction (2015)
  • Author(s): Kensuke Akiyama, Yuu Motoizumi, and Hiroshi Funakubo
  • Journal Title: Materials Research Society Symposium Proceedings Volume: 1760
  • DOI: 10.1557/opl.2015.54
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Epitaxial Growth of Luminescent β-FeSi2 on modified Si(111) Surface by Silver (2015)
  • Author(s): Kensuke Akiyama and Hiroshi Funakubo
  • Journal Title: Proceedings of SPIE Volume: 9366 Pages: 93660R-93660R
  • DOI: 10.1117/12.2079405
  • Peer Reviewed
• [Journal Article] High Temperature Reproducible Preparation of Mg2Si Films on (001)Al2O3 substrates Using RF Magnetron Sputtering Method (2014)
  • Author(s): Atsuo Katagiri, Shota Ogawa, Takao Shimizu, Masaaki Matsushima, Kensuke Akiyama, and Hiroshi Funakubo
  • Journal Title: Mater. Res. Soc. Symp. Proc Volume: 1642
  • DOI: 10.1557/opl.2014.447
  • Peer Reviewed
• [Journal Article] Electrical Properties of (110)-Oriented Nondoped Mg2Si Films with p-Type Conduction Prepared by RF Magnetron Sputtering Method (2014)
  • Author(s): Shota Ogawa, Atsuo Katagiri, Takao Shimizu, Masaaki Matsushima, Kensuke Akiyama, Yoshisato Kimura, Hiroshi Uchida, and Hiroshi Funakubo
  • Journal Title: J. Electronic Mater. Volume: 43(6) Pages: 2269-2273
  • Peer Reviewed
• [Presentation] Mg2Si薄膜の熱電特性に及ぼす歪みの影響 (2016)
  • Author(s): 黒川満央、上原睦雄、一ノ瀬大地、清水荘雄、秋山賢輔、松島正明、内田 寛、木村好里、舟窪 浩
  • Organizer: 第63回応用物理学会春季学術講演会
  • Place of Presentation: 東京工業大学 大岡山キャンパス（東京都）
  • Year and Date: 2016-03-19
• [Presentation] Growth and photoluminescence properties of Au- or N-doped β-FeSi2 (2016)
  • Author(s): Kensuke Akiyama and Hiroshi Funakubo
  • Organizer: The Optoelectronics and Photonic Materials and Devices Conference (SPIE opto)
  • Place of Presentation: The Moscone Center (San Francisco, USA)
  • Year and Date: 2016-02-16
  • Int'l Joint Research
• [Presentation] Thermoelectric characterization of sputtered Ca-Mg-Si films (2016)
  • Author(s): M. Uehara, M. Kurokawa, K. Akiyama, T. Shimizu, M. Matsushima, H. Uchida, Y. Kimura, and H. Funakubo
  • Organizer: EMA (Electronic Materials and Applications) 2016
  • Place of Presentation: DoubleTree by Hilton Orlando at Sea World (Orlando, Florida USA)
  • Year and Date: 2016-01-20
  • Int'l Joint Research
• [Presentation] スパッタリング法によるCa-Mg-Si 基膜熱電材料の特性評価 (2016)
  • Author(s): 上原睦雄、黒川満央、秋山賢輔、清水荘雄、松島正明、内田寛、木村好里、舟窪浩
  • Organizer: 第54回セラミックス基礎科学討論会
  • Place of Presentation: アバンセ（佐賀県立男女共同参画センター・佐賀県立生涯学習センター）（佐賀県）
  • Year and Date: 2016-01-07
• [Presentation] Mg2Si 薄膜の熱電特性に及ぼす種々の因子の影響 (2016)
  • Author(s): 黒川満央、上原睦雄、秋山賢輔、松島正明、内田寛、木村好里、舟窪浩
  • Organizer: 第54回セラミックス基礎科学討論会
  • Place of Presentation: アバンセ（佐賀県立男女共同参画センター・佐賀県立生涯学習センター）（佐賀県）
  • Year and Date: 2016-01-07
• [Presentation] スパッタリング法によるCa-Mg-Si基膜の作製と特性評価 (2015)
  • Author(s): 上原 睦雄、黒川 満央、秋山 賢輔、松島 正明、内田 寛、木村 好里、舟窪 浩
  • Organizer: 第76回応用物理学会秋季学術講演会
  • Place of Presentation: 名古屋国際会議場（愛知県）
  • Year and Date: 2015-09-13
• [Presentation] Phase Identification of Ca-Si Films prepared on (001) Al2O3 Substrates Using X-ray Diffraction Wide Area Reciprocal Space Mapping Method (2015)
  • Author(s): M. Uehara, K. Akiyama, M. Matsushima, T. Shimizu, H. Uchida, Y. Kimura, and H. Funakubo
  • Organizer: NIMS Conference 2015
  • Place of Presentation: Tsukuba International Congress Center EPOCHAL TSUKUBA (Tsukuba, Japan)
  • Year and Date: 2015-07-14
  • Int'l Joint Research
• [Presentation] Si粒子表面に形成した鉄シリサイドの光触媒効果による水素生成 (2015)
  • Author(s): 秋山賢輔，高橋亮，舟窪浩，入江寛，松本佳久
  • Organizer: 日本化学会第95春季年会
  • Place of Presentation: 日本大学 船橋キャンパス（千葉県）
  • Year and Date: 2015-03-28
• [Presentation] AuコートSi上に合成した鉄シリサイドのPL発光特性 (2015)
  • Author(s): 秋山賢輔，舟窪浩
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 東海大学 湘南キャンパス（神奈川県）
  • Year and Date: 2015-03-14
• [Presentation] スパッタリング法によるCa-Si膜の作製と熱電特性評価 (2015)
  • Author(s): 上原睦雄、新井洋喜、小川正太、秋山賢輔、松島正明、内田寛、木村好里、舟窪浩
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 東海大学 湘南キャンパス（神奈川県）
  • Year and Date: 2015-03-11 – 2015-03-14
• [Presentation] スパッタリング法によるCa-Si膜の作製と電気特性評価 (2015)
  • Author(s): 上原睦雄、新井洋喜、小川正太、秋山賢輔、松島正明、内田寛、木村好里、舟窪浩
  • Organizer: 第53回セラミックス基礎科学討論会
  • Place of Presentation: 京都テルサ（京都府民総合交流プラザ）（京都府）
  • Year and Date: 2015-01-08 – 2015-01-09
• [Presentation] Si粒子表面に形成した鉄シリサイドの光触媒効果による水素生成 (2014)
  • Author(s): 秋山賢輔，高橋亮，吉水 暢治，舟窪浩，入江寛，松本佳久
  • Organizer: 第21回光触媒シンポジウム
  • Place of Presentation: 東京大学 生産技術研究所（東京都）
  • Year and Date: 2014-12-12
• [Presentation] Growth of low-defect-density β-FeSi2 on Si via vapor-liquid-solid (VLS) method using liquids phase obtained by Au-Si eutectic reaction (2014)
  • Author(s): Kensuke Akiyama and Hiroshi Funakubo
  • Organizer: Materials Research Society Symposium 2014-fall meeting
  • Place of Presentation: Hynes Convention Center and Sheraton Boston Hotel（USA）
  • Year and Date: 2014-12-02
• [Presentation] β-FeSi2の光触媒効果による水素生成 (2014)
  • Author(s): 秋山賢輔， 原嘉昭，高橋亮， 吉水暢治， 舟窪浩， 入江寛， 松本佳久
  • Organizer: 第61回応用物理学会秋季学術講演会
  • Place of Presentation: 北海道大学（北海道）
  • Year and Date: 2014-09-19
• [Presentation] Photoluminescence properties of β-FeSi2 on Treated Si Surface by Metals (2014)
  • Author(s): Kensuke Akiyama and Hiroshi Funakubo
  • Organizer: ICSS-SILICIDE 2014
  • Place of Presentation: 東京理科大学 葛飾キャンパス（東京都）
  • Year and Date: 2014-07-28
• [Book] シリサイド系半導体の科学と技術（前田佳均 編著） (2014)
  • Author(s): 秋山賢輔，末益 崇,舟窪 浩（他12名共著）
  • Publisher: 裳華房
• [Remarks] 東京工業大学物質理工学院材料系舟窪研究室ホームページ
  • URL: http://f-lab.iem.titech.ac.jp/f-lab.htm
• [Remarks] 東京工業大学大学院総合理工学研究科舟窪研究室ホームページ
  • URL: http://f-lab.iem.titech.ac.jp/f-lab.htm