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Elucidation of the key factors determining the piezoelectric properties of epitaxial piezoelectric thin films on Si substrates using synchrotron X-ray diffraction

Research Project

Project/Area Number 21K14200
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 21050:Electric and electronic materials-related
Research InstitutionOsaka Metropolitan University (2022-2023)
Osaka Prefecture University (2021)

Principal Investigator

Goon Tan  大阪公立大学, 国際基幹教育機構, 准教授 (00806060)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords圧電特性 / X線構造解析 / 強誘電体薄膜 / 圧電薄膜 / エピタキシャル成長 / 放射光X線回折測定 / 結晶構造解析 / MEMSデバイス / 非鉛圧電薄膜材料
Outline of Research at the Start

圧電材料を薄膜化し、圧電MEMS(微小電気機械システム)への応用が期待されている。MEMS加工の観点からSi基板上に高品質なエピタキシャル圧電薄膜を作製し、薄膜の物性や圧電特性を詳細に調査する必要があるが、そのような研究例は極めて少ない。申請者らは、最近バッファ層付きSi基板上に、圧電薄膜を大面積でエピタキシャル成長させることに成功した。本研究は、Si基板上のエピタキシャル圧電薄膜に対して、放射光X線回折を用いた電圧印加下での結晶構造解析を行い、デバイスとしての巨視的な圧電特性と比較する。これにより、圧電薄膜の圧電特性を決定する結晶学的な主要因子を明らかにすることを目的とする。

Outline of Final Research Achievements

The application of piezoelectric materials as thin films in piezoelectric MEMS (Micro-Electro-Mechanical Systems) spans a wide range, from microactuators to piezoelectric sensors. From the perspective of MEMS processing, it is essential to fabricate high-quality epitaxial piezoelectric thin films on Si substrates, and thoroughly investigate their crystallographic and piezoelectric properties. However, such studies are still rare.
In this research, we fabricated large-area epitaxial growth of lead zirconate titanate (Pb(Zr,Ti)O3, PZT) thin films on Si substrates with buffer layers. Using synchrotron X-ray diffraction, we conducted crystal structure analysis under applied voltage on the epitaxial piezoelectric thin films on Si substrates. This allowed us to elucidate the key crystallographic factors determining the piezoelectric properties of the thin films.

Academic Significance and Societal Importance of the Research Achievements

本研究では、バッファ層付きSi基板上に作製した高品質なエピタキシャルPZT薄膜に対し、電圧を印加しながらのXRD(X線回折)測定を行い、圧電薄膜の格子ひずみといった微視的な結晶構造変化が巨視的な圧電特性にどのように寄与するのかを調査した。その結果、電圧印加下のPZT薄膜のX線回折スポットから得られた結果は、巨視的な逆圧電特性における電圧依存性と整合し、組成比の異なるPZT薄膜それぞれの圧電性の起源を解明する手がかりを得ることができた。これにより圧電特性を最大限に引き出せるような材料設計指針を検討し、圧電MEMSの性能向上、非鉛圧電薄膜の創製など、新しい展開をもたらすことが期待された。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (15 results)

All 2024 2023 2022 2021

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

  • [Journal Article] In-situ study on piezoelectric responses of sol-gel derived epitaxial Pb[Zr,Ti]O3 thin films on Si substrate2024

    • Author(s)
      Kweon Sang Hyo、Kanayama Yuichi、Tan Goon、Koganezawa Tomoyuki、Kanno Isaku
    • Journal Title

      Journal of the European Ceramic Society

      Volume: 44 Issue: 6 Pages: 3887-3894

    • DOI

      10.1016/j.jeurceramsoc.2024.01.026

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Compositional Modification of Epitaxial Pb(Zr,Ti)O<sub>3</sub> Thin Films for High‐Performance Piezoelectric Energy Harvesters2023

    • Author(s)
      Kweon Sang Hyo、Kim Eun‐Ji、Tan Goon、Kanno Isaku
    • Journal Title

      Advanced Materials Interfaces

      Volume: 11 Issue: 2 Pages: 2300634-2300634

    • DOI

      10.1002/admi.202300634

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Piezoelectric properties of epitaxial Pb(Zr,Ti)O3 thin films grown on Si substrates by the sol?gel method2023

    • Author(s)
      Tan Goon、Kweon Sang-Hyo、Kanno Isaku
    • Journal Title

      Thin Solid Films

      Volume: 764 Pages: 139612-139612

    • DOI

      10.1016/j.tsf.2022.139612

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Crystal structure and piezoelectric properties of lead-free epitaxial (K,Na)NbO<sub>3</sub> thin films grown on Si substrates2022

    • Author(s)
      Tanaka Kiyotaka、Kawata Yoshiyuki、Kweon Sang Hyo、Tan Goon、Yoshimura Takeshi、Kanno Isaku
    • Journal Title

      Applied Physics Letters

      Volume: 121 Issue: 17 Pages: 172901-172901

    • DOI

      10.1063/5.0110135

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] High output performance of piezoelectric energy harvesters using epitaxial Pb(Zr, Ti)O<sub>3</sub> thin film grown on Si substrate2022

    • Author(s)
      Kim Eun-Ji、Kweon Sang-Hyo、Nahm Sahn、Sato Yukio、Tan Goon、Kanno Isaku
    • Journal Title

      Applied Physics Letters

      Volume: 121 Issue: 16 Pages: 161901-161901

    • DOI

      10.1063/5.0105103

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Characterization of vacuum ultraviolet-irradiated surface modification of CoO(111) crystal by low-energy atom scattering spectroscopy2022

    • Author(s)
      Tan G.、Fukuta H.、De Silva K. K. H.、Matsuda A.、Yoshimura M.、Yoshimoto M.、Umezawa K.
    • Journal Title

      Journal of Vacuum Science &amp; Technology A

      Volume: 40 Issue: 6 Pages: 063202-063202

    • DOI

      10.1116/6.0001971

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Annealing effects on epitaxial (K,Na)NbO<sub>3</sub> thin films grown on Si substrates2022

    • Author(s)
      Tanaka Kiyotaka、Ogawa Rei、Kweon Sang Hyo、Tan Goon、Kanno Isaku
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 61 Issue: SN Pages: SN1020-SN1020

    • DOI

      10.35848/1347-4065/ac8143

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] In situ high-temperature X-ray diffraction measurements of Pb(Zr<sub>0.58</sub>Ti<sub>0.42</sub>)O<sub>3</sub> epitaxial thin films grown on Si substrates2022

    • Author(s)
      Kimura Goki、Kweon Sang Hyo、Tanaka Kiyotaka、Tan Goon、Koganezawa Tomoyuki、Kanno Isaku
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 61 Issue: SN Pages: SN1012-SN1012

    • DOI

      10.35848/1347-4065/ac7f7c

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] Characterization of lead-free (K,Na)NbO3 thin films fabricated by chemical solution process2023

    • Author(s)
      G. Tan
    • Organizer
      The 15th China-Japan Ferroelectric Materials and Applications Conference (CJFMA15)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fabrication and characterization of epitaxial PZT thin films on Si substrates by sol-gel process2023

    • Author(s)
      G. Tan, Y. Kanayama, S. H. Kweon and I. Kanno
    • Organizer
      The 15th International Meeting on Ferroelectricity 2023
    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 低速原子散乱分光法を用いた絶縁性材料の表面構造解析2023

    • Author(s)
      譚 ゴオン
    • Organizer
      第31回放射線利用総合シンポジウム
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Si基板上エピタキシャルゾルゲル Pb(Zr,Ti)O3薄膜の作製2022

    • Author(s)
      金山 裕一、權 相曉、譚 ゴオン、神野 伊策
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Si 基板上エピタキシャル(K, Na)NbO3 薄膜の圧電特性2021

    • Author(s)
      田中 清高,蔡 慶政,河田 佳之,Sang-Hyo Kweon,譚 ゴオン,神野 伊策
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Piezoelectric properties of Pb(Zr,Ti)O3 artificial superlattice thin films2021

    • Author(s)
      G. Kimura, S. H. Kweon, G. Tan, and I. Kanno
    • Organizer
      International Workshop on 8th Piezoelectric MEMS
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] PZT人工超格子薄膜の作製とその圧電特性2021

    • Author(s)
      木村 剛基、權 相曉、譚 ゴオン、神野 伊策
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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