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高耐熱性を有する白色LED用新規蛍光体の開発

Research Project

Project/Area Number 16J05936
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Inorganic materials/Physical properties
Research InstitutionTohoku University

Principal Investigator

温 大尉  東北大学, 工学研究科, 特別研究員(DC2)

Project Period (FY) 2016-04-22 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2017: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2016: ¥700,000 (Direct Cost: ¥700,000)
KeywordsPhosphor / Luminescence / Crystal / LED / Crystal structure / Photoluminesence / Rare earth
Outline of Annual Research Achievements

I.

Atomic scale origin of moisture resistance and thermal quenching for (Ba,Sr)3SiO5:Eu2+ was investigated. The moisture induced degradation was evaluated by the powder X-ray diffraction and photoluminescence (PL) emission. The crystal structure and electron distribution was analyzed by Rietveld refinement and density functional theory (DFT) calculation. It is found that the dispersion of electrons is relevant to effective collision and then the stability of the host lattice. Furthermore, Voronoi-Dirichilet polyhedron (VDP) is put forward to evaluate the spacial influence on the dispersion of electrons by the surrounding ions. Finally, we correlated global instability index (GII) to the lattice vibration induced thermal quenching, suggesting the significance of thermodynamic for phosphor hosts.
II.
A new ABC4(O,N)7-type oxynitride phosphor SrLuAl2Si2O2N5 is reported. The phosphors were synthesized by conventional solid state method. The crystal structure was confirmed by X-ray diffraction. The luminescence properties doping Ce3+ and Eu2+ were investigated by photoluminescence spectra. The thermal degradation was analyzed by thermogravimetric different thermal analysis (TG-DTA) and oxygen/nitrogen analysis. The performance of the phosphors was characterized by quantum efficiency and thermal quenching tests.

Research Progress Status

29年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

29年度が最終年度であるため、記入しない。

Report

(2 results)
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (5 results)

All 2018 2017 2016

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

  • [Journal Article] Site occupancy and luminescence properties of Ca3Ln(AlO)3(BO3)4:Ce3+,Tb3+,Mn2+ (Ln = Y, Gd)2017

    • Author(s)
      Dawei Wen, Hideki Kato*, Makoto Kobayashi, Shunsuke Yamamoto, Masaya Mitsuishi, Masato Kakihana
    • Journal Title

      Journal of Materials Chemistry C

      Volume: 5 Issue: 18 Pages: 4578-4583

    • DOI

      10.1039/c7tc00941k

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Anomalous Orange Light-Emitting (Sr, Ba) 2SiO4: Eu2+ Phosphors for Warm White LEDs2016

    • Author(s)
      Dawei Wen, Hiroki Kuwahara, Hideki Kato, Makoto Kobayashi, Yasushi Sato, Takaki Masaki, Masato Kakihana
    • Journal Title

      ACS applied materials & interfaces

      Volume: 8 Issue: 18 Pages: 11615-11620

    • DOI

      10.1021/acsami.6b02237

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Presentation] Super Stable Phosphors Against Thermal Oxidization2018

    • Author(s)
      Dawei Wen, Hideki Kato, Makoto Kobayashi, Masato Kakihana
    • Organizer
      日本セラミックス協会2017年年会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Solid Solutions and Luminescence Properties of Ce4+-Based Phosphors2017

    • Author(s)
      Dawei Wen, Hideki Kato, Makoto Kobayashi, Masato Kakihana
    • Organizer
      日本セラミックス協会(東京都-千代田区)
    • Place of Presentation
      日本大学 駿河台キャンパス
    • Year and Date
      2017-03-17
    • Related Report
      2016 Annual Research Report
  • [Presentation] Development of novel phosphor based on charge transfer from O2- to Ce4+2016

    • Author(s)
      Dawei Wen, Hideki Kato,Makoto Kobayashi,Masato Kakihana
    • Organizer
      日本セラミックス協会(広島県-広島市)
    • Place of Presentation
      広島大学 東広島キャンパス
    • Year and Date
      2016-09-07
    • Related Report
      2016 Annual Research Report

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Published: 2016-05-17   Modified: 2024-03-26  

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