Details of a Researcher - HAYAKAWA Tomokatsu

Papers - HAYAKAWA Tomokatsu

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Photoluminescence Study of Undoped and Eu-Doped Alkali-Niobate Aluminosilicate Glasses and Glass-Ceramics International coauthorship

17 ( 2283 ) 1 - 22 2024.05

Language：English

DOI： https://doi.org/10.3390/ma17102283

Tuning the luminescence color of Eu3+- and alkali-ion-codoped Sr2CaWO6 orange-red phosphors: Eu3+ site distribution and site-selective photoluminescence studies International coauthorship

12 ( 031129 ) 1 - 16 2024.03

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)

DOI： https://doi.org/10.1063/5.0197892

Bandgap and photoluminescence tuanbility of lead-free Cs3Bi2(Br,I)9 solid colution compounds Reviewed International coauthorship

H.Hashimoto, R.Oka, T.Hayakawa*, C.Brabec,

Phys.Status Solidi RRL 2023 2300241 2023.10

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)

DOI： https://doi.org/10.1002/pssr.202300241

Photoluminescence color prediction for Eu3+-doped perovskite red phosphors using machine learning Reviewed

T.Otsuka, R.Oka, M.Karasuyama, T.Hayakawa*

Phys.Status Solidi RRL 2023 2300237 2023.10

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)

DOI： https://doi.org/10.1002/pssr.202300237

Eu3+ Site Distribution and Local Distortion of Photoluminescent Ca3WO6:(Eu3+, K+) Double Perovskites as High-Color-Purity Red Phosphors Reviewed

T.Otsuka, R.Oka, T.Hayakawa*,

Adv.Sci. 2023 2302559 2023.09

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)

DOI： https://doi.org/10.1002/advs.202302559

Other Link： https://doi.org/10.1002/advs.202302559

Alkali-Niobate aluminosilicate glasses: Structure and properties Reviewed International coauthorship

M R. Cicconi, D.K.Dobesh, B.Schroeder, T.Otsuka, T.Hayakawa, D.de Ligny,

Opt.Mater.X 18 100228 2023.09

Authorship：Last author Language：English Publishing type：Research paper (scientific journal)

DOI： https://doi.org/10.1016/j.omx.2023.100228

Atomic structure of ZrO2-doped Li2O–SiO2-based multi-component glasses revealed by molecular dynamics–reverse Monte Carlo modeling Reviewed International coauthorship

R.Toyoda, K.Usui, T.Hirota, K.Kimura, Y.Onodera, M.R.Cicconi, R.Belli, M.Brehl, J.Lubauer, U.Lohbauer, H.Tajiri, K.Ikeda, T.Hayakawa, D.de Ligny, S.Kohara, K.Hayashi

J. Non-Cryst. Solids 616 122472 2023.09

Authorship：Last author Language：English Publishing type：Research paper (scientific journal)

DOI： https://doi.org/10.1016/j.jnoncrysol.2023.122472

X-ray Diffraction, Micro-Raman and X-ray Photoemission Spectroscopic Investigations for Hydrothermally Obtained Hybrid Compounds of Delafossite CuGaO2 and Wurtzite ZnO International coauthorship

Minuk Choi, Christoph Brabec and Tomokatsu Hayakawa*

Ceramics 5 655 - 672 2022.09

Authorship：Corresponding author

DOI： https://doi.org/10.3390/ceramics5040048

Chemical route for synthesis of β-SiAlON:Eu2+ phosphors combining polymer-derived ceramics route with non-hydrolytic sol-gel chemistry Invited Reviewed International coauthorship

Yang Gao, Daiki Hamana, Ryo Iwasaki, Junya Iihama, Sawao Honda, Munni Kumari, Tomokatsu Hayakawa, Samuel Bernard, Philippe Thomas, Yuji Iwamoto

Journal of Sol-Gel Science and Technology 2022 1 - 13 2022.06

DOI： https://doi.org/10.1007/s10971-022-05879-w

High-Temperature Investigation of TeO2–Na2O–ZnO Glasses Invited Reviewed International coauthorship

Jonathan de Clermont-Gallerande,* Daiki Taniguchi, Maggy Colas, Philippe Thomas, and Tomokatsu Hayakawa*

Phys.Status Solidi (b) 2022 2200065-1 - 2200065-7 2022.04

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)

DOI： https://doi.org/10.1002/pssb.202200065

93Nb NMR Study of (K, Na)NbO3-Doped SiO2–Na2O–Al2O3 Glasses Invited Reviewed International coauthorship

Takahito Otsuka,* Maria Rita Cicconi, David Dobesh, Barbara Schroeder, and Tomokatsu Hayakawa*

Phys.Status Solidi (b) 2022 2200016-1 - 2200016-6 2022.04

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)

DOI： https://doi.org/10.1002/pssb.202200016

Introduction of a planar defect into colloidal photonic-crystal films and their optical properties Reviewed

Kenta Komatsu, Tomokatsu Hayakawa, Hiroshi Fudouzi*

Advanced Powder Technology 33 103594-1 - 103594-7 2022.04

Language：English Publishing type：Research paper (scientific journal)

DOI： https://doi.org/10.1016/j.apt.2022.103594

Nucleation mechanisms in a SiO2-Li2O-P2O5-ZrO2 biomedical glass-ceramic: Insights on crystallisation, residual glasses and Zr4+ structural environment International coauthorship

M.R. Cicconi, R. Belli, M. Brehl, J. Lubauer, T. Hayakawa, K. Kimura, T. Hirota, K. Usui, S. Kohara, Y. Onodera, U. Lohbauer, K. Hayashi, D. de Ligny

Journal of the European Ceramic Society 42 1762 - 1775 2022.04

DOI： https://doi.org/10.1016/j.jeurceramsoc.2021.12.009

Novel findings on optical properties of Mn4+-doped (Rb,K)2Ge4O9 phosphors Invited Reviewed International journal

R.Oka*, D.Nishi, T.Hayakawa

Phys.Status Solidi (b) 2022.02

Language：English Publishing type：Research paper (scientific journal)

Simple method to estimate fractional numbers of Eu3+ ions in different phases in highly luminescent ZrO2-SiO2 nanocomposites Invited Reviewed International coauthorship International journal

T.Hayakawa*, R.Ikeshita, J.-R.Duclere, A.Leconte,

Phys.Status Solidi (b) 2022.02

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

Polymer-derived β-SiAlON:Eu2+ phosphors Reviewed

Yang Gao, Junya Iihama, Daiki Hamana, Ryo Iwasaki, Sawao Honda, Toru Asaka, Munni Kumari, Tomokatsu Hayakawa, Samuel Bernard, Philippe Thomas, Yuji Iwamoto

Int J Appl Ceram Technol. 2022 1 - 12 2022.09

Language：English Publishing type：Research paper (scientific journal)

DOI： https://doi.org/10.1111/ijac.14228

Green emitting 𝛃-SiAlON:Eu2+ phosphors derived from chemically modified perhydropolysilazanes Reviewed

Yang Gao, Ryo Iwasaki, Daiki Hamana, Junya Iihama, Sawao Honda1, Munni Kumari, Tomokatsu Hayakawa, Samuel Bernard, Philippe Thomas, Yuji Iwamoto

Int J Appl Ceram Technol. 2022 1 - 13 2022.06

Language：English

DOI： https://doi.org/10.1111/ijac.14139

Correlation between mechanical and structural properties as a function of temperature within the TeO2-TiO2-ZnO ternary system Reviewed International coauthorship

J.de Clermont-Gallerande, M.Dutreilh -Colas, R.Célarié, M.Berger, D.deLigny, T.Hayakawa, P.Thomas

J.Non-Cryst.Solids 528 ( 1 ) 119716 2020.01

Language：English Publishing type：Research paper (scientific journal)

Influence of Nd3+ modifying on 80TeO2-xZnO-(20-x)Na2O ternary glass system Reviewed International coauthorship International journal

Jonathan de Clermont-Gallerande, Taniguchi Daiki, Maggy Colas, Philippe Thomas, Tomokatsu Hayakawa

APL Mater. 2021.12

Language：English Publishing type：Research paper (scientific journal)

Thermal evolution to glass-ceramics bearing calcium tungstate crystals in borate glasses doped with photoluminescent Eu3+ ions Reviewed International coauthorship International journal

T.Otsuka, M.Brehl, M.R.Ciconni, D.de Ligny, T.Hayakawa

Materials 14 952 2021.04

Language：English Publishing type：Research paper (scientific journal)

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Papers - HAYAKAWA Tomokatsu