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Three-dimensional analysis of dopant atoms in phosphors via HAADF-STEM imaging

Research Project

Project/Area Number 17K14805
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Inorganic materials/Physical properties
Research InstitutionHokkaido University

Principal Investigator

Saito Genki  北海道大学, 工学研究院, 特任助教 (00749278)

Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords電子顕微鏡 / 三次元観察 / HAADF / STEM / セラミックス / 蛍光体 / 透過型電子顕微鏡 / ドーパント / 解析・評価 / HAADF-STEM / 3Dイメージング
Outline of Final Research Achievements

Three-dimensional (3D) distributional analysis of individual dopant atoms in materials is important to understand their properties. In this study, through-focus high-angle annular dark-field (HAADF) imaging was developed for 3D distributional analysis of dopant atoms in phosphors, in which the defocus was changed in narrow steps, and the contrast profile obtained for various depths at each dopant column was analyzed to determine the depth position of dopant atoms. For the analysis of Eu atoms in Ca-α-SiAlON, the effect of convergence semi-angle was investigated using multi-slice image simulation. Because the electron beam tends spread instead of channeling along the atomic columns, the large convergence semi-angle greatly increased the depth resolution. Through-focus HAADF-STEM imaging was used to analyze the Eu atom distribution. The contrast depth profile recorded with a narrow step width clearly analyzed the possible depth positions of Eu atoms.

Academic Significance and Societal Importance of the Research Achievements

(1) X線などを用い、平均的な情報から原子の分布を解析する方法と異なり、ドーパント原子を直接観察するため、定量性の高い分析が可能となる。
(2) 開発したドーパント原子の三次元可視化技術はαSiAlON蛍光体に限らず、他のセラミックス、金属全般に広く適用可能であり、本研究によりこれら関連分野のさらなる発展が期待できる。
(3) 像シミュレーションは実験結果とよく一致し、原子の可視化可能性を事前の像計算で判断できる。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (23 results)

All 2019 2018 2017 Other

All Journal Article (9 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 8 results,  Open Access: 3 results,  Acknowledgement Compliant: 1 results) Presentation (9 results) (of which Int'l Joint Research: 1 results) Remarks (4 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Combustion synthesis of AlN doped with carbon and oxygen2019

    • Author(s)
      Genki Saito, Yuji Kunisada, Takumi Watanabe, Xuemei Yi, Takahiro Nomura, Norihito Sakaguchi, Tomohiro Akiyama
    • Journal Title

      Journal of the American Ceramic Society

      Volume: 102 Issue: 1 Pages: 524-532

    • DOI

      10.1111/jace.15947

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Formation of Different Si3N4 Nanostructures by Salt-Assisted Nitridation2018

    • Author(s)
      Liu Xiongzhang、Guo Ran、Zhang Sengjing、Li Qingda、Saito Genki、Yi Xuemei、Nomura Takahiro
    • Journal Title

      ACS Applied Materials & Interfaces

      Volume: 10 Issue: 14 Pages: 11852-11861

    • DOI

      10.1021/acsami.7b16952

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Sr substitution effects on atomic and local electronic structure of Ca2AlMnO5+δ2018

    • Author(s)
      Kunisada Yuji、Saito Genki、Hayami Kazuki、Nomura Takahiro、Sakaguchi Norihito
    • Journal Title

      Surface and Interface Analysis

      Volume: 51 Issue: 1 Pages: 65-69

    • DOI

      10.1002/sia.6549

    • NAID

      120006776815

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of a microencapsulated Al?Si phase change material with high-temperature thermal stability and durability over 3000 cycles2018

    • Author(s)
      Sheng Nan、Zhu Chunyu、Saito Genki、Hiraki Takehito、Haka Miki、Hasegawa Yuta、Sakai Hiroki、Akiyama Tomohiro、Nomura Takahiro
    • Journal Title

      Journal of Materials Chemistry A

      Volume: 6 Issue: 37 Pages: 18143-18153

    • DOI

      10.1039/c8ta04708a

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Solution-Plasma-Mediated Synthesis of Si Nanoparticles for Anode Material of Lithium-Ion Batteries2018

    • Author(s)
      Saito Genki、Sasaki Hitoshi、Takahashi Heishichiro、Sakaguchi Norihito
    • Journal Title

      Nanomaterials

      Volume: 8 Issue: 5 Pages: 286-286

    • DOI

      10.3390/nano8050286

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Combustion synthesis of YAG:Ce phosphors via the thermite reaction of aluminum2018

    • Author(s)
      Ohyama Junpei、Zhu Chunyu、Saito Genki、Haga Miki、Nomura Takahiro、Sakaguchi Norihito、Akiyama Tomohiro
    • Journal Title

      Journal of Rare Earths

      Volume: 36 Issue: 3 Pages: 248-256

    • DOI

      10.1016/j.jre.2017.06.014

    • NAID

      120006803941

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Estimating the Spatial Distribution of Ca Dopants in α-SiAlON by Statistical Analysis of HAADF-STEM Image2017

    • Author(s)
      Norihito Sakaguchi, Fuuta Yamaki, Genki Saito, Yuji Kunisada
    • Journal Title

      MATERIALS TRANSACTIONS

      Volume: 58 Issue: 10 Pages: 1341-1345

    • DOI

      10.2320/matertrans.MAW201705

    • NAID

      130006096691

    • ISSN
      1345-9678, 1347-5320
    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of Al particle size and nitrogen pressure on AlN combustion synthesis2017

    • Author(s)
      Hiranaka Ayako、Yi Xuemei、Saito Genki、Niu Jing、Akiyama Tomohiro
    • Journal Title

      Ceramics International

      Volume: 43 Issue: 13 Pages: 9872-9876

    • DOI

      10.1016/j.ceramint.2017.04.170

    • Related Report
      2017 Research-status Report
  • [Journal Article] Enhanced cycling performance of surface-doped LiMn2O4 modified by a Li2CuO2-Li2NiO2 solid solution for rechargeable lithium-ion batteries2017

    • Author(s)
      Cheng-Gong Han, Chunyu Zhu, Genki Saito, Nan Sheng, Takahiro Nomura, Tomohiro Akiyama
    • Journal Title

      Electrochimica Acta

      Volume: 224 Pages: 71-79

    • DOI

      10.1016/j.electacta.2016.12.041

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] HAADF-STEM法による蛍光体材料中ドーパントの空間分布解析2018

    • Author(s)
      齊藤元貴,國貞雄治,坂口紀史
    • Organizer
      日本顕微鏡学会第74回学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 炭素および酸素をドープしたAlNの燃焼合成2018

    • Author(s)
      齊藤 元貴,國貞 雄治,渡邉 拓海,能村 貴宏,衣 雪梅,坂口 紀史,秋山 友宏
    • Organizer
      日本金属学会2018年秋期講演大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Sr添加したCa2AlMnO5+δ酸素吸蔵材料のSTEM-EELS解析2018

    • Author(s)
      坂口 紀史,速水 一輝,齊藤 元貴,國貞 雄治,能村 貴宏
    • Organizer
      日本金属学会2018年秋期講演大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] HAADF-STEM法によるドーパント分布解析における電子チャネリングの影響2018

    • Author(s)
      齊藤元貴,國貞雄治,坂口紀史
    • Organizer
      日本金属学会2018年春期講演大会
    • Related Report
      2017 Research-status Report
  • [Presentation] HAADF-STEM 法によるドーパント分布解析におけるフォーカス依存性2017

    • Author(s)
      齊藤 元貴,國貞 雄治,坂口 紀史
    • Organizer
      平成29年度公益社団法人日本顕微鏡学会 北海道支部学術講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] スルーフォーカスHAADF-STEM法によるドーパント分布解析における収束角の影響2017

    • Author(s)
      齊藤 元貴,八巻 風太,國貞 雄治,坂口 紀史
    • Organizer
      日本金属学会2017年秋期講演大会
    • Related Report
      2017 Research-status Report
  • [Presentation] スルーフォーカスHAADF-STEM法によるCa-α-SiAlON中Eu原子の3次元分布解析2017

    • Author(s)
      齊藤元貴,八巻風太,國貞雄治,坂口紀史
    • Organizer
      日本顕微鏡学会第73回学術講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] 酸素吸蔵材料Ca2AlMnO5+δの局所電子状態の分析2017

    • Author(s)
      齊藤元貴,速水一輝,國貞雄治,能村貴宏,坂口紀史
    • Organizer
      日本顕微鏡学会第73回学術講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] Dopant distribution analysis of Eu-doped Ca-α-SiAlONvia HAADF-STEM imaging2017

    • Author(s)
      G. Saito, F. Yamaki, Y. Kunisada, N. Sakaguchi, T. Akiyama
    • Organizer
      9th International Symposium on Nitrides and Related Materials (ISNT2017) & 5th International Symposium on SiAlONs and Non-oxides (ISSNOX5)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Remarks] Research map

    • URL

      https://researchmap.jp/s_genki

    • Related Report
      2018 Annual Research Report
  • [Remarks] 北海道大学 研究者総覧

    • URL

      https://researchers.general.hokudai.ac.jp/profile/ja.e90c16042c063c91520e17560c007669.html

    • Related Report
      2018 Annual Research Report
  • [Remarks] 北海道大学研究者総覧

    • URL

      https://researchers.general.hokudai.ac.jp/profile/ja.5FyljXCxr4RwkAZdxTrkQw==.html

    • Related Report
      2017 Research-status Report
  • [Remarks] researchmap

    • URL

      https://researchmap.jp/s_genki/

    • Related Report
      2017 Research-status Report
  • [Patent(Industrial Property Rights)] 窒化アルミニウムの製造方法2018

    • Inventor(s)
      秋山友宏、仙田竜也、能村貴宏、齊籐元貴、福永豊
    • Industrial Property Rights Holder
      秋山友宏、仙田竜也、能村貴宏、齊籐元貴、福永豊
    • Industrial Property Rights Type
      特許
    • Filing Date
      2018
    • Related Report
      2018 Annual Research Report

URL: 

Published: 2017-04-28   Modified: 2020-03-30  

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