Institute of Multidisciplinary Research for Advanced Materials, Tohoku University


LAST UPDATE 2021/05/03

  • 研究者氏名
    Researcher Name

    長谷川拓哉 Takuya HASEGAWA
    講師 Lecturer
  • 所属
    Professional Affiliation

    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

    無機材料研究部門 環境無機材料化学研究分野
    Division of Inorganic Material Research, Environmental Inorganic Materials Chemistry
  • 研究キーワード
    Research Keywords

    Inorganic materials
    Crystal structural analysis
Research Subject
Development of new photo-functional materials based on solid-state chemistry

研究の背景 Background


Rare-earth and transition metal ions have specific optical response behaviors, particularly inorganic materials using the luminescence properties have extensively applied in everyday living. Since the optical properties of those materials are strongly depending on the crystal structure, it is very important to understand the correlations between the structure and optical properties for control of the photo-functions.

研究の目標 Outcome


The main objective of research is to reveal the correlation between the crystal structure and photo-functionality by development of new functional inorganic materials mainly composed of oxide crystal. Particularly, the luminescence properties are controlled by local structure in the crystal lattice. Additionally, this study is aiming the discovery of new functional materials using that correlations.

研究図Research Figure

Fig.1. PL and PLE spectra and crystal structure of a new Ce3+-activated red-emitting oxide phosphor, Sr3Sc4O9:Ce3+.

Fig.2. PL, PLE and Mn K-edge XANES spectra of Li2TiO3:Mn4+ phosphors synthesized by sol-gel and solid-state reaction method. Relationship of effective Mn4+ conc. and PLQEs.

Fig.3. PL and PLE spectra of LiCa3MV3O12 (M=Mg and Zn) phosphor. Plot of PL positions v.s. V-O distance for Garnet vanadate phosphors.

文献 / Publications

ACS Omega, (2019), in press. Inorg. Chem., 57, 857-866 (2018). J. Mater. Chem. C, 5, 9472-9478 (2017). RSC Adv., 7, 25089-25094 (2017). J. Alloys Compd., 797, 1181-1189 (2019). Dalton Trans., 45, 11554-11559 (2016). Chem. Lett., 43, 828-830 (2014). Chem. Lett., 45, 1096-1098 (2016).