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2019 Fiscal Year Annual Research Report

Development of novel near-infrared persistent phosphors for bio-imaging

Research Project

Project/Area Number 18F18051
Research InstitutionKyoto University

Principal Investigator

田部 勢津久  京都大学, 人間・環境学研究科, 教授 (20222119)

Co-Investigator(Kenkyū-buntansha) XU JIAN  京都大学, 人間・環境学研究科(研究院), 外国人特別研究員
Project Period (FY) 2018-04-25 – 2020-03-31
Keywords長残光 / 蛍光体 / 近赤外光 / 希土類 / 電子トラップ / エネルギー移動 / 発光ダイオード
Outline of Annual Research Achievements

In this year, the subject is composed of two parts: (i) Optical probes for excitation-free brain imaging; (ii) Ceramic persistent phosphors toward efficient flicker suppression in alternating current (AC)-wLEDs. For (i), Fluorescence based optical imaging using NIR light is a noninvasive imaging technique, which possesses the possibility to acquire real-time data at a high speed, and allows for the time-resolved detection of in vivo dynamic processes with high spatial and temporal resolution. The wavelength region longer than 1.0um in SWIR; the 2nd (NIR-II, 1.0-1.35um) and 3rd (NIR-III, 1.5-1.8um) windows, is highly advantageous over the shorter NIR-I one because of lower scattering coefficient result in improved contrast quality, higher spatial resolution. Inspired by the energy levels of lanthanoid and transition metal ions in host matrix like garnets or perovskites, we realized long persistent luminescence (over 10 hours after ceasing external excitation) in the NIR-III window utilizing the persistent energy transfer from Cr3+ to Er3+ in GAGG garnet structure, and Cr3+ to Nd3+ LaAlO3 perovskite structure in the NIR-II window. For (ii), based on the research result in garnet-based persistent phosphors, by modifying the Ga3+ substitution in Ce3+-Cr3+ co-doped GAGG garnets, yellow persistent phosphors have been fabricated able to generate intense initial persistent luminescence to suppress the flicker effect of AC-driven LEDs. The best sample exhibits obvious flicker suppression, with flicker ~26.15% and index ~0.07 for the sinusoidal waveform.

Research Progress Status

令和元年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和元年度が最終年度であるため、記入しない。

  • Research Products

    (17 results)

All 2020 2019 Other

All Int'l Joint Research (3 results) Journal Article (7 results) (of which Int'l Joint Research: 7 results,  Peer Reviewed: 7 results) Presentation (6 results) (of which Int'l Joint Research: 3 results,  Invited: 3 results) Remarks (1 results)

  • [Int'l Joint Research] Venezia Ca'Foscari 大学(イタリア)

    • Country Name
      ITALY
    • Counterpart Institution
      Venezia Ca'Foscari 大学
  • [Int'l Joint Research] Zhengzhou大学(中国)

    • Country Name
      CHINA
    • Counterpart Institution
      Zhengzhou大学
  • [Int'l Joint Research] Chimie ParisTech (CNRS)/Universite Orleans (CNRS, CEMHTI)(フランス)

    • Country Name
      FRANCE
    • Counterpart Institution
      Chimie ParisTech (CNRS)/Universite Orleans (CNRS, CEMHTI)
  • [Journal Article] Advance in Red-Emitting Mn4+-activated Oxyfluoride Phosphors2020

    • Author(s)
      H. Ji, Z. Zhang, J. Xu, S. Tanabe, D. Chen, R. Xie,
    • Journal Title

      J. Inorg. Mater.

      Volume: in press Pages: in press

    • DOI

      10.15541/jim20190554.

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Effective Ratiometric Luminescent Thermal Sensor by Cr3+‐Doped Mullite Bi2Al4O9 with Robust and Reliable Performances2020

    • Author(s)
      M. Back, J. Ueda, J. Xu, K. Asami, M. G. Brik, S. Tanabe
    • Journal Title

      Adv. Opt. Mater.

      Volume: 8 Pages: 2000124(1-10)

    • DOI

      10.1002/adom.202000124

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Persistent luminescence instead of phosphorescence: History, mechanism, and perspective2019

    • Author(s)
      J. Xu, S. Tanabe,
    • Journal Title

      J. Lumin.

      Volume: 205 Pages: 581-620

    • DOI

      10.1016/j.jlumin.2018.09.047

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Local Coordination and Electronic Structure of Ce3+ in Isostructural Sr2GdAlO5 and Sr3AlO4F Phosphor2019

    • Author(s)
      H. Ji, J. Xu, K. Asami, J. Ueda, M. Brik, S. Tanabe,
    • Journal Title

      J. Am. Ceram. Soc.

      Volume: 102 Pages: 1316-1328

    • DOI

      10.1111/jace.15985

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Uncovering the Origin of the Emitting States in Bi3+-Activated CaMO3 (M=Zr, Sn, Ti) Perovskites: Metal-to-Metal Charge Transfer versus s-p Transitions2019

    • Author(s)
      M. Back, J. Ueda, J. Xu, K. Asami, L. Amidani, E. Trave, S. Tanabe,
    • Journal Title

      J. Phys. Chem. C

      Volume: 123 Pages: 14677-14688

    • DOI

      10.1021/acs.jpcc.9b03940

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Persistent energy transfer in ZGO:Cr3+,Yb3+: a new strategy to design nano glass-ceramics featuring deep red and near infrared persistent luminescence2019

    • Author(s)
      V. Castaing, A. D. Sontakke, J. Xu, A. J. Fernandez-Carrion, C. Genevois, S. Tanabe, M. Allix, B. Viana
    • Journal Title

      Phys. Chem. Chem. Phys.

      Volume: 21 Pages: 19458-19468

    • DOI

      10.1039/c9cp02927c

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Ratiometric Luminescent Thermometers with Customized Phase-Transition Driven Fingerprint in Perovskite Oxides2019

    • Author(s)
      M. Back, J. Ueda, J. Xu, D. Murata, M. G. Brik, S. Tanabe,
    • Journal Title

      ACS Appl. Mater. Interfaces

      Volume: 11 Pages: 38937-38945

    • DOI

      10.1021/acsami.9b13010

    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Persistent Luminescence in Garnets: from Visible to Near-Infrared Light2020

    • Author(s)
      J. Xu, J. Ueda, S. Tanabe,
    • Organizer
      レーザー学会学術講演会 第40回年次大会
    • Invited
  • [Presentation] Ratiometric Optical Thermometer Based on Exchange-Coupled Cr3+ paris in LaAlO32019

    • Author(s)
      J. Xu, J. Ueda, S. Tanabe,
    • Organizer
      日本セラミックス協会 2019年 年会
  • [Presentation] Ratiometric Optical Thermometer Based on Exchange-Coupled Cr3+ pairs in LaAlO3: Old Story Approaching New Application2019

    • Author(s)
      J. Xu, D. Murata, M. Back, J. Ueda, M. Brik, S. Tanabe,
    • Organizer
      The Eleventh International Conference on High-Performance Ceramics (CICC)
    • Int'l Joint Research
  • [Presentation] 1.2 μm Persistent Luminescence of Ho3+ in LaAlO3 and LaGaO3 Perovskites2019

    • Author(s)
      J. Xu, D. Murata, B. So, J. Ueda, J. Heo, S. Tanabe,
    • Organizer
      EMN Meeting on Nanoparticles 2019
    • Int'l Joint Research / Invited
  • [Presentation] Garnet Ceramic Persistent Phosphors toward Efficient Flicker Suppression in Remote-Type AC-wLEDs2019

    • Author(s)
      J. Xu J. Ueda, S. Tanabe
    • Organizer
      Phosphor Safari 2019
    • Int'l Joint Research / Invited
  • [Presentation] Garnet ceramic persistent phosphors toward efficient flicker suppression in Remote-Type AC-wLEDs2019

    • Author(s)
      J. Xu, J. Ueda, S. Tanabe,
    • Organizer
      第60回ガラスおよびフォトニクス材料討論会
  • [Remarks] 京都大学田部研究室HP

    • URL

      www.talab.h.kyoto-u.ac.jp

URL: 

Published: 2021-01-27  

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