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その場観察法による各種半導体材料の固液界面不安定化現象の解明と高温物性値の決定

Research Project

Project/Area Number 21H04658
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 30:Applied physics and engineering and related fields
Research InstitutionTohoku University

Principal Investigator

藤原 航三  東北大学, 金属材料研究所, 教授 (70332517)

Co-Investigator(Kenkyū-buntansha) 前田 健作  東北大学, 金属材料研究所, 助教 (40634564)
Project Period (FY) 2021-04-05 – 2025-03-31
Project Status Granted (Fiscal Year 2024)
Budget Amount *help
¥42,640,000 (Direct Cost: ¥32,800,000、Indirect Cost: ¥9,840,000)
Fiscal Year 2024: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Fiscal Year 2023: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Fiscal Year 2022: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Fiscal Year 2021: ¥19,630,000 (Direct Cost: ¥15,100,000、Indirect Cost: ¥4,530,000)
Keywords固液界面 / 半導体 / 融液成長 / その場観察 / 結晶粒界 / ファセット
Outline of Research at the Start

本研究は、「各種半導体材料の固液界面ダイナミクスの基礎学術的理解の深化」を目的として実施する。具体的には、1)各種半導体(単成分、混晶、化合物)バルク単結晶の成長速度の限界値、2)各種半導体バルク多結晶の成長速度の限界値、3)各種半導体において結晶粒界の構造が固液界面ダイナミクスに及ぼす影響、4)各種半導体の固液界面における物性値を明らかにする。本研究では、Si(単成分)、SixGe1-xとBixSb1-x(全率固溶型混晶)、GaSbとInSb (Ⅲ-Ⅴ族化合物半導体)およびCdTe(Ⅱ-Ⅵ族化合物半導体)を研究対象として、固液界面不安定化現象の詳細な観察と解析によってこれらの課題を解決する。

Outline of Annual Research Achievements

本研究は、「各種半導体材料の固液界面ダイナミクスの基礎学術的理解の深化」を目的として実施している。2023年度は、単成分半導体であるSiの固液界面ダイナミクスに関して、{110}面と{100}面、また{110}面と{111}面の成長速度の違いについて実験的に明らかにした。また、{111}面の微斜面における成長メカメカニズムについても研究を開始した。さらに、固液界面における粒界の成長に関して、実験結果に基づいた新しいモデルの構築を開始した。
混晶半導体に関しては、Bi-Sb系合金に関して、固液界面不安定化に及ぼす組成の影響を実験的に明らかにした。
Ⅲ-Ⅴ族化合物半導体に関しては、InSbの成長速度の異方性を明らかにするために、その場観察実験を行い、{111}A面と{111}B面の成長速度の違いについて検討を行った。これまでに両面の成長速度の違いはそれほど大きくないことが分かっているが、2024年度も引き続き実験を継続し、成長速度の大小関係を明確にしたい。
また、Ⅱ-Ⅵ族化合物半導体であるCdTeの大型結晶作製に向けて、新しい結晶成長技術の開発を行っている。これまでに、20cm角の大型多結晶インゴットが得られている。今後、単結晶化へ向けて更なる技術開発を行う。
半導体の固液界面ダイナミクスの研究に関して、フランスの研究グループとの共同研究を開始した。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

本研究では、単成分半導体、全率固溶型半導体、化合物半導体の固液界面ダイナミクスを明らかにすることを目的として実施している。現在までに、単成分半導体に関しては、Siの成長速度異方性を実験的に明らかにし、従来不明であった{110}面の成長に関して多くの知見が得られている。また、{111}面の微斜面の成長に関して、実験的証拠が得られており、今後、その成長メカニズムに関してモデルを提唱できる段階にある。さらに、結晶粒界の成長に関して、実験結果に基づいて新しいモデルを構築している。混晶半導体に関しては、Si-Ge系の固液界面ダイナミクスの研究に加え、Bi-Sb系でも実験を開始した。固液界面不安定化が生じる臨界成長速度の組成依存性を実験的に明らかにしている。化合物半導体に関しては、Ⅱ—Ⅵ族およびⅢ—Ⅴ族化合物半導体であるCdTeおよびInSbを対象に実験を行っており、前者では新しい大型結晶の成長技術開発が順調に進んでいる。後者では、{111}面の極性が成長速度に及ぼす影響に関して様々な実験を行っており、成長速度の違いに関して詳細な議論ができる結果が得られつつある。
以上のように、本研究では、各種半導体の融液成長メカニズムに関して多くの知見が得られており、さらに大型結晶の成長技術開発も進められている。よって、おおむね順調に進展していると判断できる。

Strategy for Future Research Activity

各種半導体の固液界面ダイナミクスの解明のために、引き続き、固液界面のその場観察実験を主体に研究を進めていく。当グループでは光学的な観察手法により固液界面の観察を行っているが、3次元的な観察のために、マルセイユ大学(フランス)の研究チームと共同で放射光施設を用いた実験も開始する。また、実験結果に基づいた成長モデルの構築において、理論研究者と協力して研究を進めていく。化合物半導体の研究に関しては、いくつかの企業が当グループの結果に注目しており、今後、共同研究に発展させる予定である。これまでに、特に大きな問題はなく順調に研究が行われているため、今後も当初の計画通りに研究を進めていきたい。

Report

(4 results)
  • 2023 Annual Research Report
  • 2022 Annual Research Report
  • 2021 Comments on the Screening Results   Annual Research Report
  • Research Products

    (40 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (3 results) Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 7 results,  Open Access: 1 results) Presentation (30 results) (of which Int'l Joint Research: 14 results,  Invited: 8 results)

  • [Int'l Joint Research] Aix-Marseille University(フランス)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Aix-Marseille University(フランス)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Anna University(インド)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] In situ study of growth kinetics of {100} and {110} crystal/melt interfaces during unidirectional solidification of silicon2024

    • Author(s)
      Shashank Shekhar Mishra, Lu-Chung Chuang, Kensaku Maeda, Jun Nozawa, Haruhiko Morito, Thierry Duffar, Kozo Fujiwara
    • Journal Title

      Journal of Crystal Growth

      Volume: 627 Pages: 127524-127524

    • DOI

      10.1016/j.jcrysgro.2023.127524

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Dynamics at crystal/melt interface during solidification of multicrystalline silicon2022

    • Author(s)
      Fujiwara Kozo、Chuang Lu-Chung、Maeda Kensaku
    • Journal Title

      High Temperature Materials and Processes

      Volume: 41 Issue: 1 Pages: 31-47

    • DOI

      10.1515/htmp-2022-0020

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Facet formation during the solidification of pure antimony2022

    • Author(s)
      Shiga Keiji、Maeda Kensaku、Morito Haruhiko、Fujiwara Kozo
    • Journal Title

      Journal of Crystal Growth

      Volume: 586 Pages: 126633-126633

    • DOI

      10.1016/j.jcrysgro.2022.126633

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] In situ observation of solidification and subsequent evolution of Ni-Si eutectics2022

    • Author(s)
      Chuang Lu-Chung、Maeda Kensaku、Morito Haruhiko、Fujiwara Kozo
    • Journal Title

      Scripta Materialia

      Volume: 211 Pages: 114513-114513

    • DOI

      10.1016/j.scriptamat.2022.114513

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Difference in growth rates at {1 1 0} and {1 1 1} crystal/melt interfaces of silicon2022

    • Author(s)
      Mishra Shashank Shekhar、Chuang Lu-Chung、Maeda Kensaku、Nozawa Jun、Morito Haruhiko、Fujiwara Kozo
    • Journal Title

      Journal of Crystal Growth

      Volume: 593 Pages: 126784-126784

    • DOI

      10.1016/j.jcrysgro.2022.126784

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Twin boundary formation at a grain-boundary groove during the directional solidification of InSb2022

    • Author(s)
      Keiji Shiga, AtsukoTakahashi, Lu-Chung Chuang, Kensaku Maeda, Haruhiko Morito, Kozo Fujiwara
    • Journal Title

      Journal of Crystal Growth

      Volume: 577 Pages: 126403-126403

    • DOI

      10.1016/j.jcrysgro.2021.126403

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dendritic Growth in Si1-xGex Melts2021

    • Author(s)
      Genki Takakura, Mukannan Arivanandhan, Kensaku Maeda, Lu-Chung Chuang, Keiji Shiga, Haruhiko Morito, Kozo Fujiwara
    • Journal Title

      Crystals

      Volume: 11 Issue: 7 Pages: 761-761

    • DOI

      10.3390/cryst11070761

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Groove formation of Σ9 grain boundaries at solid/melt interface of Si2023

    • Author(s)
      荘 履中、前田 健作、野澤 純、森戸 春彦、藤原 航三
    • Organizer
      日本金属学会2023年秋期講演大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] In situ observation of growth behavior of small-angle grain boundaries in multicrystalline silicon during directional solidification2023

    • Author(s)
      Lu-Chung Chuang, Kozo Fujiwara
    • Organizer
      23rd American Conference on Crystal Growth and Epitaxy
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] In situ observation of instability of crystal/melt interface in pure Sb and Sb1-xBix alloys2023

    • Author(s)
      Takuya Yoshizawa, Keiji Shiga, Yutaro Suda, Lu-Chung Chuang, Haruhiko Morito, Kozo Fujiwara
    • Organizer
      20th International Conference on Crystal Growth and Epitaxy
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Vicinal {111} surfaces at Si solid-liquid interface2023

    • Author(s)
      Shashank Shekhar Mishra, Lu-Chung Chang, Jun Nozawa, Kensaku Maeda, Haruhiko Morito, Kozo Fujiwara, Thierry Duffar
    • Organizer
      20th International Conference on Crystal Growth and Epitaxy
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Dislocation Interaction with Faceted Groove at Grain Boundary in Multicrystalline-silicon2023

    • Author(s)
      Yang Fan, Lu-Chung Chang, Kensaku Maeda, Jun Nozawa, Haruhiko Morito, Kozo Fujiwara, Thierry Duffar
    • Organizer
      20th International Conference on Crystal Growth and Epitaxy
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Growth dynamics of lattice dislocations and small-angle grain boundaries in multicrystalline silicon during directional solidification2023

    • Author(s)
      Lu-Chung Chuang, Kensaku Maeda, Jun Nozawa, Haruhiko Morito, Kozo Fujiwara
    • Organizer
      20th International Conference on Crystal Growth and Epitaxy
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation of Vicinal (111) surfaces at Si solid-liquid interface during directional solidification2023

    • Author(s)
      Shashank Shekhar Mishra, Lu-Chung Chuang, Nozawa Jun, Kensaku Maeda, Haruhiko Morito, Kozo Fujiwara, Thierry Duffar
    • Organizer
      第52回結晶成長国内会議
    • Related Report
      2023 Annual Research Report
  • [Presentation] In situ observation of interfacial grooves of Σ9 grain boundaries during directional solidification of Si2023

    • Author(s)
      荘 履中、前田 健作、野澤 純、森戸 春彦、藤原 航三
    • Organizer
      第52回結晶成長国内会議
    • Related Report
      2023 Annual Research Report
  • [Presentation] InSbにおける固液界面不安定化のその場観察2023

    • Author(s)
      高橋拓実、前田 健作、荘 履中、野澤 純、宇田 聡、森戸 春彦、藤原 航三
    • Organizer
      第52回結晶成長国内会議
    • Related Report
      2023 Annual Research Report
  • [Presentation] コロイドヘテロエピタキシャル成長における多形転移と結晶成長2023

    • Author(s)
      野澤 純、宇田 聡、藤原 航三
    • Organizer
      第52回結晶成長国内会議
    • Related Report
      2023 Annual Research Report
  • [Presentation] Instability of crystal/melt interface of Si and Si1-xGex2023

    • Author(s)
      Kozo Fujiwara
    • Organizer
      3rd International Symposium on Modeling of Crystal Growth Processes and Devices
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] In-situ observation of crystal/melt interface morphology during directional solidification of semiconductor materials2023

    • Author(s)
      Kozo Fujiwara
    • Organizer
      5th International Workshop on Advanced Functional Nanomaterials
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 半導体材料の固液界面現象のその場観察2023

    • Author(s)
      藤原航三
    • Organizer
      応用物理学会結晶工学分科会 第27回結晶工学セミナー
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Iterface kinetics at {100}, {110}, and {111} silicon planes during melt-growth process2023

    • Author(s)
      Shashank Shekar Mishra, Lu-Chung Chuang, Jun Nozawa, Kensaku Maeda, Haruhiko Morito, Kozo Fujiwara
    • Organizer
      5th International Workshop on Advanced Functional Nanomaterials
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Dynamics at the crystal melt interface during the directional solidification of mc Si2022

    • Author(s)
      Kozo Fujiwara
    • Organizer
      Indo-Japan Workshop on Silicon Crystal Growth for Photovoltaic Applications
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] In-situ observations of crystal growth behaviors of silicon during solidification2022

    • Author(s)
      Kozo Fujiwara
    • Organizer
      International Conference on Solid State Devices and Materials
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Fundamental phenomena during solidification of mc- Si2022

    • Author(s)
      Kozo Fujiwara
    • Organizer
      International Conference on Sustainable Materials and Technologies for Energy and Bio Applications
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Decomposition of small-angle grain boundaries during directional solidification of multicrystalline silicon2022

    • Author(s)
      Lu-Chung Chuang, Kensaku Maeda, Haruhiko Morito, Kozo Fujiwara
    • Organizer
      11th International Workshop on Crystalline Silicon for Solar Cells & 4th Silicon Materials Workshop
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Experimental measurement of growth velocity anisotropy along {100}, {110} and {111} planes of silicon during melt growth process2022

    • Author(s)
      Shashank Shekar Mishra, Lu-Chung Chuang, Jun Nozawa, Kensaku Maeda, Haruhiko Morito, Kozo Fujiwara
    • Organizer
      The 33rd International Photovoltaic Science and Engineering Conference(PVSEC-33)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Dislocation generation from small-angle grain boundaries during directional solidification of multicrystalline silicon2022

    • Author(s)
      Lu-Chung Chuang, Kensaku Maeda, Haruhiko Morito, Kozo Fujiwara
    • Organizer
      The 33rd International Photovoltaic Science and Engineering Conference(PVSEC-33)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Small-angle grain boundaries as sources of generation and absorption of dislocations during directional solidification of multicrystalline silicon2022

    • Author(s)
      荘 履中、前田 健作、野澤 純、 森戸 春彦、藤原 航三
    • Organizer
      日本金属学会2022年秋期講演大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Grain boundary interaction in directional solidification of multi-crystalline silicon2022

    • Author(s)
      楊 凡、荘 履中、前田 健作、野澤 純、 森戸 春彦、藤原 航三
    • Organizer
      日本金属学会2022年秋期講演大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Growth behavior at {100} and {110} crystal/melt interfaces during directional solidification of Si2022

    • Author(s)
      Shashank Shekar Mishra, Lu-Chung Chuang, Jun Nozawa, Kensaku Maeda, Haruhiko Morito, Kozo Fujiwara
    • Organizer
      第51回結晶成長国内会議(JCCG-51)
    • Related Report
      2022 Annual Research Report
  • [Presentation] Crystallographic orientation and growth velocity anisotropy in melt growth of silicon2022

    • Author(s)
      Shashank Shekhar Mishra, Lu-Chung Chuang, Jun Nozawa, Kensaku Maeda, Haruhiko Morito, Kozo Fujiwara
    • Organizer
      日本金属学会2022年春期第170回講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Dynamics at the crystal-melt interface during the directional solidification of mc-Si2022

    • Author(s)
      Kozo Fujiwara
    • Organizer
      Indo-Japan Workshop on Silicon Crystal Growth for Photovoltaic Applications
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Interactions of small-angle grain boundaries with lattice dislocations during solidification of silicon2021

    • Author(s)
      荘 履中、前田 健作、森戸 春彦、藤原 航三
    • Organizer
      日本金属学会2021年秋期第169回講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] シリコン固液界面近傍の温度場測定2021

    • Author(s)
      前田 健作、辻田 蓮、荘 履中、森戸 春彦、藤原 航三
    • Organizer
      日本金属学会2021年秋期第169回講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Small-angle grain boundaries as sinks for lattice dislocations during directional solidification of silicon2021

    • Author(s)
      荘 履中、前田 健作、野澤 純、森戸 春彦、藤原 航三
    • Organizer
      第50回結晶成長国内会議
    • Related Report
      2021 Annual Research Report
  • [Presentation] Orientation dependence of crystal growth velocity in melt growth of silicon2021

    • Author(s)
      Mishra Shashank Shekhar, Kozo Fujiwara, Haruhiko Morito, Kensaku Maeda, Jun Nozawa, Lu-Chung Chuang
    • Organizer
      第50回結晶成長国内会議
    • Related Report
      2021 Annual Research Report
  • [Presentation] シリコンの融液成長界面近傍の温度測定2021

    • Author(s)
      前田 健作、辻田 蓮、荘 履中、森戸 春彦、藤原 航三
    • Organizer
      第50回結晶成長国内会議
    • Related Report
      2021 Annual Research Report

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Published: 2021-04-28   Modified: 2024-12-25  

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