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Low dislocation AlN growth by super high temperature MOVPE in jet engine model

Research Project

Project/Area Number 20K21006
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 21:Electrical and electronic engineering and related fields
Research InstitutionThe University of Tokushima

Principal Investigator

NAGAMATSU Kentaro  徳島大学, ポストLEDフォトニクス研究所, 准教授 (40774378)

Project Period (FY) 2020-07-30 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2020: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Keywords窒化物半導体 / 高温結晶成長 / 窒化アルミニウム / 深紫外LED
Outline of Research at the Start

AlNは物性から2000℃以上の温度が求められるが、一般的なMOVPE装置は1200℃までの仕様になっている。原因としては成長原料流路の部材として使われる高純度石英が1200℃から劣化が始まるためである。
ジェットエンジンは2000℃環境にて耐熱600℃のチタン合金を使用している。これは大気を圧縮しチタン合金に小さく空いた穴から空気が噴き出すことによって高温のガスと壁面が直接触れないようになっているシステムである。
本研究ではシミュレーションによる反応路内の温度の状態を算出しつつ、2019年度に導入する結晶成長装置にジェットエンジンの構造を取り込み1500℃以上の温度で安定的な結晶成長を実現する。

Outline of Final Research Achievements

Computational fluid dynamics simulation estimated the reaction between the raw materials in high-temperature growth processing. Moreover, we realized to develop ultra-high temperature metalorganic vapor phase epitaxy with the immitted jet engine structure. Then, we study the improvement of crystalline quality in AlN for the underlying layer of deep ultra-violet LEDs. Specifically, this method can reduce parasitic reactions in the vapor phase for pre-reaction during raw material transportation by computational fluid dynamics simulation. The actual crystal growth experiment also reduced the parasitic reaction at the estimated growth condition in the simulation. The growth method achieved AlN crystal growth at over 1500℃, which is difficult to conventional metalorganic vapor phase epitaxy. We confirmed the improved crystalline quality of AlN by high-temperature growth.

Academic Significance and Societal Importance of the Research Achievements

近年、殺菌技術の発展が求められるアプリケーションにおいて、深紫外LEDの要素技術と言えるAlNの結晶性改善に効果が高い高温結晶成長を実現した。AlNの高品質化により、深紫外LEDの高輝度化に大きく貢献できる可能性があり、デバイスの応用分野拡大や半導体レーザなど新たなデバイスの創出に発展することが期待される。また、結晶成長装置の高温プロセス実現は、AlNだけにとどまらず高温成長が求められる材料のポテンシャルを引き出すことが可能になり、新たな材料開発の礎となることを期待している。

Report

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

    (25 results)

All 2023 2022 2021

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (22 results) (of which Int'l Joint Research: 10 results,  Invited: 3 results)

  • [Journal Article] High growth temperature for AlN by jet stream gas flow metalorganic vapor phase epitaxy2023

    • Author(s)
      Nagamatsu Kentaro、Miyagawa Takumi、Tomita Atsushi、Hirayama Hideki、Takashima Yuusuke、Naoi Yoshiki
    • Journal Title

      Scientific Reports

      Volume: 13 Issue: 1 Pages: 24381-7

    • DOI

      10.1038/s41598-023-29150-6

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Investigation of V/III ratio dependencies for optimizing AlN growth during reduced parasitic reaction in metalorganic vapor phase epitaxy2023

    • Author(s)
      Tomita Atsushi、Miyagawa Takumi、Hirayama Hideki、Takashima Yuusuke、Naoi Yoshiki、Nagamatsu Kentaro
    • Journal Title

      Scientific Reports

      Volume: 13 Issue: 1 Pages: 33081-7

    • DOI

      10.1038/s41598-023-30489-z

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Reduction of parasitic reaction in high-temperature AlN growth by jet stream gas flow metalorganic vapor phase epitaxy2022

    • Author(s)
      Nagamatsu Kentaro、Tsuda Shota、Miyagawa Takumi、Aono Reiya、Hirayama Hideki、Takashima Yuusuke、Naoi Yoshiki
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 76621-7

    • DOI

      10.1038/s41598-022-10937-y

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] High-temperature growth in AlN by MOVPE2023

    • Author(s)
      Kentaro Nagamatsu
    • Organizer
      ISPlasma2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 超高温MOVPEを用いたAlGaN成長2023

    • Author(s)
      富田 敦之, 宮川 拓己, 平山 秀樹, 髙島 祐介, 直井 美貴, 永松 謙太郎
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Threshold temperature in annihilation radius of dislocation for AlN2022

    • Author(s)
      Shota Tsuda, Takumi Miyagawa, Reiya Aono, Atsushi Tomita, Hideki Hirayama, Yuusuke Takashima, Yoshiki Naoi and Kentaro Nagamatsu
    • Organizer
      Photonics West 2022, 12001-66, San Francisco (Web会議)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The improvement of crystal orientation in AlN with controlled inversion domain2022

    • Author(s)
      Shota Tsuda, Takumi Miyagawa, Reiya Aono, Atsushi Tomita, Hideki Hirayama, Yuusuke Takashima, Yoshiki Naoi and Kentaro Nagamatsu
    • Organizer
      Photonics West 2022, 12001-67, San Francisco (Web会議)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Virus inactivation using ultraviolet LEDs2022

    • Author(s)
      Kentaro Nagamatsu
    • Organizer
      CLEO-PR 2022, Sapporo
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] The high-temperature growth in AlN with the unaffected parasitic reaction by Jet gas stream MOVPE2022

    • Author(s)
      Kentaro Nagamatsu, Takumi Miyagawa, Atsushi Tomita, Hideki Hirayama, Yuusuke Takashima and Yoshiki Naoi
    • Organizer
      International Workshop on Nitride semiconductor 2022, Berlin
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Dependence of c-plane sapphire misorientation angle in high temperature AlN growth and specific step bunching at large angle2022

    • Author(s)
      Takumi Miyagawa, Atsushi Tomita, Shota Tsuda, Hideki Hirayama, Yuusuke Takashima, Yoshiki Naoi and Kentaro Nagamatsu
    • Organizer
      International Workshop on Nitride semiconductor 2022, Berlin
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Lateral epitaxial overgrowth by mass transport in AlN with the temperature of 17002022

    • Author(s)
      Takumi Miyagawa, Atsushi Tomita, Hideki Hirayama, Yuusuke Takashima, Yoshiki Naoi and Kentaro Nagamatsu
    • Organizer
      International Workshop on Nitride semiconductor 2022, Berlin
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高温有機金属気相成長法におけるAlNの特異的なステップバンチング2022

    • Author(s)
      宮川 拓己, 津田 翔太, 富田 敦之, 平山 秀樹, 髙島 祐介, 直井 美貴, 永松 謙太郎
    • Organizer
      第69回応用物理学会春季学術講演会, 25a-E203-2 (Web会議)
    • Related Report
      2022 Annual Research Report
  • [Presentation] 低オフ角サファイヤ基板を用いた高温AIN成長におけるV/Ⅲ比依存性2022

    • Author(s)
      富田 敦之, 津田 翔太, 宮川 拓己, 平山 秀樹, 髙島 祐介, 直井 美貴, 永松 謙太郎
    • Organizer
      第69回応用物理学会春季学術講演会, 25a-E203-3 (Web会議)
    • Related Report
      2022 Annual Research Report
  • [Presentation] 有機金属気相成長法による高温AlN成長2022

    • Author(s)
      永松 謙太郎
    • Organizer
      第14回ナノ構造エピタキシャル成長講演会, Fr-I04,
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] The improvement of crystal orientation in AlN with controlled inversion domain2022

    • Author(s)
      Shota Tusuda, Takumi Miyagawa, Reiya Aono, Atsushi Tomita, Hideki Hirayama, Yuusuke Takashima, Yoshiki Naoi, and Kentaro Nagamatsu
    • Organizer
      Photonics West 2022, 12001-67, San Francisco.
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Threshold temperature in annihilation radius of dislocation for AlN2022

    • Author(s)
      Shota Tusuda, Takumi Miyagawa, Reiya Aono, Atsushi Tomita, Hideki Hirayama, Yuusuke Takashima, Yoshiki Naoi, and Kentaro Nagamatsu
    • Organizer
      Photonics West 2022, 12001-66, San Francisco.
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] The reduction of adduct formation during high-temperature growth in AlN by jet gas stream metalorganic vapor phase epitaxy2022

    • Author(s)
      Kentaro Nagamatsu, Shota Tsuda, Takumi Miyagawa, Reiya Aono, Hideki Hirayama, Yuusuke Takashima, and Yoshiki Naoi
    • Organizer
      Photonics West 2022, 12001-6, San Francisco.
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 低オフ角サファイア基板を用いた高温AlN成長におけるV/III比依存性2022

    • Author(s)
      富田 敦之, 津田 翔太, 宮川 拓己, 平山 秀樹, 髙島 祐介, 直井 美貴, 永松 謙太郎
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 高温有機金属気相成長法におけるAlNの特異的なステップバンチング2022

    • Author(s)
      宮川 拓己, 津田 翔太, 富田 敦之, 平山 秀樹, 髙島 祐介, 直井 美貴, 永松 謙太郎
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 気相反応を制御したMOVPEにおけるAlNのV/III比依存性2021

    • Author(s)
      富田 敦之, 津田 翔太, 宮川 拓己, 髙島 祐介, 直井 美貴, 平山 秀樹, 永松 謙太郎
    • Organizer
      第50回日本結晶成長学会
    • Related Report
      2021 Research-status Report
  • [Presentation] インバージョンドメインの抑制による高品質AlN成長手法の確立2021

    • Author(s)
      津田 翔太, 宮川 拓己, 富田 敦之, 平山 秀樹, 髙島 祐介, 直井 美貴, 永松 謙太郎
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 高温有機金属気相成長法におけるAlN成長の気相反応抑制2021

    • Author(s)
      永松謙太郎、津田翔太、青野零弥、宮川学、揚田侑哉、平山秀樹、髙島祐介、直井美貴
    • Organizer
      第68回 応用物理学会春季学術講演会 19p-Z27-14
    • Related Report
      2020 Research-status Report
  • [Presentation] AlNの高流速成長における成長メカニズム2021

    • Author(s)
      宮川学、津田翔太、青野零弥、揚田侑哉、平山秀樹、髙島祐介、直井美貴、永松謙太郎
    • Organizer
      第68回 応用物理学会春季学術講演会 19p-Z27-13
    • Related Report
      2020 Research-status Report
  • [Presentation] 低温AlNバッファ層上高温AlN初期成長2021

    • Author(s)
      青野零弥、津田翔太、揚田侑哉、宮川学、平山秀樹、髙島祐介、直井美貴、永松謙太郎
    • Organizer
      第68回 応用物理学会春季学術講演会 19a-Z27-1
    • Related Report
      2020 Research-status Report
  • [Presentation] AlNテンプレート上高温AlN結晶成長2021

    • Author(s)
      津田翔太、青野零弥、揚田侑哉、宮川学、平山秀樹、髙島祐介、直井美貴、永松謙太郎
    • Organizer
      第68回 応用物理学会春季学術講演会 19p-Z27-3
    • Related Report
      2020 Research-status Report

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Published: 2020-08-03   Modified: 2024-01-30  

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