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Growth of high-quality alloy semiconductor bulk crystals based on experimental results in space

Research Project

Project/Area Number 19H02491
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 26060:Metals production and resources production-related
Research InstitutionJapan Aerospace EXploration Agency

Principal Investigator

INATOMI Yuko  国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 教授 (50249934)

Co-Investigator(Kenkyū-buntansha) 鵜殿 治彦  茨城大学, 理工学研究科(工学野), 教授 (10282279)
岡野 泰則  大阪大学, 大学院基礎工学研究科, 教授 (90204007)
VELU NIRMALKUMAR  国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 宇宙航空プロジェクト研究員 (60804482)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2021: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2020: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2019: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
KeywordsInGaSb結晶 / 外力場印加 / その場観察 / 試料の詳細分析 / 数値シミュレーション / 3次元分析
Outline of Research at the Start

混晶半導体InxGa1-xSb結晶はその組成比を変えることで構造や電気的・光学的特性を制御出来るため、赤外線素子および高速電子素子素用基板材料として期待されている。しかし、それらの均一組成・低欠陥のバルク単結晶の育成が課題である。結晶の高品質化のために無対流条件が最適であるとして宇宙実験が実施されたが、多結晶化を抑制できないという新たな課題が判明した。そこで本研究は、強磁場と電場の複合印加による溶融帯中の対流と温度勾配を同時制御することで、従来に比べ結晶の特性が格段に向上した高品質In0.11Ga0.89Sbバルク結晶の育成を地上で実現し、他の混晶半導体結晶成長への適用を検討する。

Outline of Final Research Achievements

A method for growing high-quality InGaSb crystals was investigated through a combination of A) crystal growth by applying an external force field, B) in-situ observation of the crystal growth process, C) detailed analysis of samples obtained from space and ground experiments, and D) large-scale numerical simulation of the crystal growth process. As a result, the following results were obtained. (1) Upgrading of the vertical gradient freezing method by applying a strong magnetic field. (2) Achievement of the highest thermoelectric figure of merit in III-V semiconductors. (3) Discovery of the concentration dependence of the diffusion coefficient of GaSb in InSb melt. (4) Suggestion of the possibility of crystal quality improvement by applying numerical calculations and optimization strategies.

Academic Significance and Societal Importance of the Research Achievements

宇宙実験および地上実験の試料の分析、大規模数値計算、外力場印加による結晶成長条件の制御によって、従来では困難とされてきた高品質InGaSb結晶の育成を地上で実現する道筋を作った。この技術開発は、熱光起電システムを中心とした再生エネルギー利用に資する新たなデバイス製造技術の促進に貢献する。また、半導体融液における拡散係数の濃度依存性の発見は、その分子レベルでの物理的な説明の可能性を探るという新たな学術的課題を提供した。そして、適応制御の方策は、他の結晶成長プロセスの連続的かつ迅速な最適化に大きな可能性を持つことを示した。

Report

(4 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (12 results)

All 2022 2021 2020 2019

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results) Presentation (9 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] Control of growth interface shape during InGaSb growth by vertical gradient freezing under microgravity, and optimization using machine learning2022

    • Author(s)
      Ghritli Rachid、Okano Yasunori、Inatomi Yuko、Dost Sadik
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 61 Issue: 11 Pages: 115502-115502

    • DOI

      10.35848/1347-4065/ac99c2

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Estimation of the diffusion coefficient of GaSb in InSb melt using Bayesian optimization and the ISS experimental results2021

    • Author(s)
      Rachid Ghritli, Yasunori Okano, Yuko Inatomi, Atsushi Sekimoto, Sadik Dost
    • Journal Title

      Journal of Crystal Growth

      Volume: 573 Pages: 126280-126280

    • DOI

      10.1016/j.jcrysgro.2021.126280

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] An Approach to Optimize the Thermoelectric Properties of III-V Ternary InGaSb Crystals by Defect Engineering via Point Defects and Microscale Compositional Segregations2019

    • Author(s)
      Kumar Velu Nirmal, Hayakawa Yasuhiro, Udono Haruhiko, Inatomi Yuko
    • Journal Title

      Inorganic Chemistry

      Volume: 58 Issue: 17 Pages: 11579-11588

    • DOI

      10.1021/acs.inorgchem.9b01430

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] Growth interface shape optimization and adaptive process control for InGaSb crystal growth under microgravity using machine learning2022

    • Author(s)
      Rachid Ghritli, Yuko Inatomi, Yasunori Okano
    • Organizer
      化学工学会第53回秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 国際宇宙ステーションを利用した混晶半導体結晶育成に関する数値解析2021

    • Author(s)
      岡野泰則, 稲富裕光
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Estimation of Diffusion Coefficient of GaSb into InSb Melt by using Bayesian Optimization Method Based on the ISS Experimental Results2020

    • Author(s)
      Ghritli RACHID, Atsushi SEKIMOTO, Yasunori OKANO, Yuko INATOMI
    • Organizer
      日本マイクログラビティ応用学会第32回学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 数値解析を用いたISS内InGaSb結晶成長実験に基づいた拡散係数評価2020

    • Author(s)
      沖田和也, 関本敦, 岡野泰則, 稲富裕光, 早川泰弘
    • Organizer
      第22回化学工学会学生発表会
    • Related Report
      2019 Annual Research Report
  • [Presentation] InGaSb Crystal Growth under Long-duration Microgravity Condition2019

    • Author(s)
      Yuko Inatomi, Nirmal Kumar Velu, Yasunori Okano, Jianding Yu, Yasuhiro Hayakawa
    • Organizer
      EUROMAT 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Alloying and Doping Effects of Ga with InSb for Thermoelectric Energy Conversion2019

    • Author(s)
      Velu Nirmal Kumar, Yasuhiro Hayakawa, Haruhiko Udono and Yuko Inatomi
    • Organizer
      EUROMAT 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ISS内InGaSb結晶成長実験の数値解析2019

    • Author(s)
      沖田和也, Jin Xin, 関本敦, 岡野泰則, 稲富裕光, 早川泰弘
    • Organizer
      第48回結晶成長国内会議
    • Related Report
      2019 Annual Research Report
  • [Presentation] 強磁場および微小重力環境における化合物半導体結晶成長2019

    • Author(s)
      稲富裕光
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 微小重力環境下における結晶成長実験結果を活用した高温融液内拡散係数の決定 -数値解析を用いた実験条件の設定から物性値算出まで-2019

    • Author(s)
      岡野泰則, ジン シン, 関本 敦, 山本卓也, 稲富裕光, 早川泰弘
    • Organizer
      第56回日本伝熱シンポジウム
    • Related Report
      2019 Annual Research Report

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Published: 2019-04-18   Modified: 2024-01-30  

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