Yamamoto Tomoyuki 山本知之

… Alternative Names

山本知之ヤマモトトモユキ

YAMAMOTO Tomoyuki 山本知之

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Researcher Number	40298196
Other IDs
Affiliation (Current)	2025: 早稲田大学, 理工学術院, 教授
Affiliation (based on the past Project Information) *help	2020 – 2023: 早稲田大学, 理工学術院, 教授 2014 – 2016: 早稲田大学, 理工学術院, 教授 2011 – 2012: 早稲田大学, 理工学術院, 教授
Review Section/Research Field	Principal Investigator Basic Section 26010:Metallic material properties-related / Inorganic materials/Physical properties / Science and Engineering
Keywords	Principal Investigator 第一原理計算 / 局所環境解析 / 太陽電池 / 蛍光体 / アップコンバージョン蛍光体 / 再生可能エネルギー / 先端分光分析 / 結晶構造解析 / エネルギーハーべスティング / 先端分析 … More / ペロブスカイト型酸化物 / スピントロにクス / スピントロニクス / シンクロトロン放射光 / X線吸収端近傍微細構造 / 希薄磁性体 / 地殻・マントル化学 / 内部変動・物性 / 高圧力 / プロトン / 地球マントル物質 Less

Research Projects
(4 results)
Research Products
(40 results)

アップコンバージョン型蛍光体によるペロブスカイト太陽電池の高効率化Principal Investigator
- Principal Investigator
  
  山本知之
- Project Period (FY)
  2023 – 2025
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 26010:Metallic material properties-related
- Research Institution
  Waseda University
Development of high-efficiency up-conversion oxide phosphor material and the analysis of its light-emitting mechanismPrincipal Investigator
- Principal Investigator
  
  Yamamoto Tomoyuki
- Project Period (FY)
  2020 – 2022
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 26010:Metallic material properties-related
- Research Institution
  Waseda University
Study on the mechanism of ferromagnetism in dilute magnetic oxidesPrincipal Investigator
- Principal Investigator
  
  YAMAMOTO Tomoyuki
- Project Period (FY)
  2014 – 2016
- Research Category
  
  Grant-in-Aid for Challenging Exploratory Research
- Research Field
  
  Inorganic materials/Physical properties
- Research Institution
  Waseda University
第一原理計算による地球マントル物質に及ぼすプロトン存在の影響に関する研究Principal Investigator
- Principal Investigator
  
  山本知之
- Project Period (FY)
  2011 – 2012
- Research Category
  
  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
- Review Section
  
  Science and Engineering
- Research Institution
  Waseda University

All 2024 2023 2022 2021 2020 2016 2015 2014 2012 2011

All Journal Article Presentation

[Journal Article] Ab initio calculations of two-site occupation for substituting ions in MgTa2O6:Cr3+ phosphor: The geometric and electronic structures and optical transition energies2024
- Author(s)
  Umar Zafari、Khyzhun Oleg、Yamamoto Tomoyuki、Br?giel Piotr
- Journal Title
  
  Optical Materials
  
  Volume: 149 Pages: 115057-115057
- DOI
  10.1016/j.optmat.2024.115057
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K04363
[Journal Article] First-principles calculations of the electronic structure and mechanical properties of non-doped and Cr3+-Doped K2LiAlF6 under pressure2024
- Author(s)
  Umar Zafari、Kurboniyon Mekhrdod S.、Khyzhun Oleg、Yamamoto Tomoyuki、Ma Chong-Geng、Brik Mikhail G.、Piasecki Michal
- Journal Title
  
  Journal of Luminescence
  
  Volume: 266 Pages: 120278-120278
- DOI
  10.1016/j.jlumin.2023.120278
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K04363
[Journal Article] First-principles study of geometric and electronic structures, and optical transition energies of Mn4+ impurity ions: K2SiF6 as a prototype2023
- Author(s)
  Kurboniyon Mekhrdod S.、Lou Bibo、Zafari Umar、Rahimi Farhod、Srivastava Alok M.、Yamamoto Tomoyuki、Brik Mikhail G.、Ma Chong-Geng
- Journal Title
  
  Journal of Luminescence
  
  Volume: 263 Pages: 120103-120103
- DOI
  10.1016/j.jlumin.2023.120103
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K04363
[Journal Article] Geometrical and Electronic Structure Analysis of Mn‐Doped CaMO 3 (M?=?Ti, Zr, and Sn)2023
- Author(s)
 Kurboniyon Mekhrdod S.、Zafari Umar、Ma Chong-Geng、Piasecki Michal、Brik Mikhail G.、Yamamoto Tomoyuki
- Journal Title
 
 physica status solidi (b)
 
 Volume: 260 Issue: 9 Pages: 2200575-2200575
- DOI
 10.1002/pssb.202200575
- Peer Reviewed / Int'l Joint Research
- Data Source
 KAKENHI-PROJECT-20K05065
[Journal Article] Recent Progress in Nanostructured Functional Materials and Their Applications II2023
- Author(s)
  Yamamoto Tomoyuki、Yoshiya Masato、Nhat Hoang Nam
- Journal Title
  
  MATERIALS TRANSACTIONS
  
  Volume: 64 Issue: 3 Pages: 707-714
- DOI
  10.2320/matertrans.MT-M2022181
- ISSN
  1345-9678, 1347-5320
- Year and Date
  2023-03-01
- Language
  English
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K05065
[Journal Article] Influence of Isostatic Pressure on the Elastic and Electronic Properties of K2SiF6:Mn4+2022
- Author(s)
  Subhoni Mekhrdod、Zafari Umar、Ma Chong-Geng、Srivastava Alok M.、Beers William W.、Cohen William E.、Brik Mikhail G.、Piasecki Michal、Yamamoto Tomoyuki
- Journal Title
  
  Materials
  
  Volume: 15 Issue: 2 Pages: 613-613
- DOI
  10.3390/ma15020613
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K05065
[Journal Article] Influence of co-doping of divalent ions on the photoluminescence intensity of Mn4+ doped CaAl12O192022
- Author(s)
  Zafari Umar、Sagayama Musashi、Subhoni Mekhrdod、Srivastava Alok M.、Beers William W.、Cohen William E.、Ma Chong-Geng、Piasecki Michal、Brik Mikhail G.、Yamamoto Tomoyuki
- Journal Title
  
  Optical Materials: X
  
  Volume: 16 Pages: 100197-100197
- DOI
  10.1016/j.omx.2022.100197
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K05065
[Journal Article] Theoretical and Experimental Investigations of Mn4+ Site Occupation in CaAl12O192021
- Author(s)
 Sagayama Musashi、Zafari Umar、Subhoni Mekhrdod、Srivastava Alok M.、Beers William W.、Cohen William E.、Brik Mikhail G.、Yamamoto Tomoyuki
- Journal Title
 
 ECS Journal of Solid State Science and Technology
 
 Volume: 10 Issue: 7 Pages: 076004-076004
- DOI
 10.1149/2162-8777/ac13df
- Peer Reviewed / Int'l Joint Research
- Data Source
 KAKENHI-PROJECT-20K05065
[Journal Article] First-principles investigations of geometrical and electronic structures of Mn4+ doped A2SiF6 (A= K, Rb, Cs) red phosphors2021
- Author(s)
  Subhoni Mekhrdod、Zafari Umar、Srivastava Alok M.、Beers William W.、Cohen William、Brik Mikhail G.、Yamamoto Tomoyuki
- Journal Title
  
  Optical Materials
  
  Volume: 115 Pages: 110986-110986
- DOI
  10.1016/j.optmat.2021.110986
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K05065
[Journal Article] Local environment analysis of Fe ions in BaMgSiO42016
- Author(s)
  J. Kase, S. Shingaki, Y. Inaba, K. Meguro, H. Murata, T. Okajima and T. Yamamoto
- Journal Title
  
  AIP-Conference Proceedings
  
  Volume: 1763 Pages: 050007-050007
- DOI
  10.1063/1.4961360
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-26630325
[Presentation] Effect of Na co-doping on the upconversion luminescence intensity of Er-doped CaMoO42024
- Author(s)
  Tomoki Koikawa, Tomoyuki Yamamoto
- Organizer
  7th International Symposium on Frontiers in Materials Science
- Data Source
  KAKENHI-PROJECT-23K04363
[Presentation] アルカリ金属共添加によるEr添加CaMoO4のアップコンバージョン発光強度の向上2024
- Author(s)
  鯉川　智生、山本　知之
- Organizer
  日本セラミックス協会2024年年会
- Data Source
  KAKENHI-PROJECT-23K04363
[Presentation] Influence of local environment of emission center ions on the luminescence property of phosphor materials2023
- Author(s)
  15)Tomoyuki Yamamoto, Moe Hirano, Tomoki Koikawa, Dilshod Nematov, Amondulloi Burkhonzoda, Zafari Umar, Mikhail G. Brik
- Organizer
  European Materials Research Society 2023 Fall Meeting
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K04363
[Presentation] ドーパミン塩酸塩添加FAPbI3の室温大気中での相安定性向上2023
- Author(s)
  大長稜平, 柴山直之, 池上正志, 宮坂力, 宮澤優, 小林大輔, 廣瀬和之, 山本知之
- Organizer
  第70回　応用物理学会　春季学術講演会
- Data Source
  KAKENHI-PROJECT-20K05065
[Presentation] Er添加シェーライト構造酸化物のアップコンバージョン発光特性評価2023
- Author(s)
  鯉川　智生、山本　知之
- Organizer
  日本金属学会2023年秋期講演大会
- Data Source
  KAKENHI-PROJECT-23K04363
[Presentation] Local environment of emission center ions in phosphor materials2022
- Author(s)
  Tomoyuki Yamamoto
- Organizer
  6th International Symposium on Fronties in Materials Science
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K05065
[Presentation] Influence of co-dopings of alkaline metal ions in Er-doped CaSnO3 on its up-conversion emission intensity2022
- Author(s)
  Fuma Samejima, Naoki Ogi, Tomoyuki Yamamoto
- Organizer
  6th International Symposium on Fronties in Materials Science
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K05065
[Presentation] Experimental and theoretical investigations of local environment of Mn ions in red phosphors2022
- Author(s)
  Tomoyuki Yamamoto, Mekhrdod Subhoni, Umar Zafari, , Musashi Sagayama, Mikhail G. Brik
- Organizer
  E-MRS 2022 Fall Meeting
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K05065
[Presentation] Stabilization of alpha-FAPbI3 by addition of dopamine hydrochloride2022
- Author(s)
  Ryohei Oonaga, Naoyuki Shibayama, Masashi Ikegami, Tsutomu Miyasaka, Yu Miyazawa, Daisuke Kobayashi, Kazuyuki Hirose, Tomoyuki Yamamoto
- Organizer
  6th International Symposium on Fronties in Materials Science
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K05065
[Presentation] Influence of Additional Doping of Divalent Ions on Emission Intensity of Mn-doped CaAl12O192020
- Author(s)
  M. Sagayama, U. Zafari, M. Subhoni, M.G. Brik, and T. Yamamoto
- Organizer
  PRiME2020
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K05065
[Presentation] Influence of additional doping of divalent ions on luminescence of Mn-doped CaAl12O192020
- Author(s)
  M. Sagayama, U. Zafari, M. Subhoni, M.G. Brik, and T. Yamamoto
- Organizer
  第30回日本MRS年次大会
- Data Source
  KAKENHI-PROJECT-20K05065
[Presentation] Experimental and Theoretical Analysis of Photoluminescence from Mn-doped Oxide Phosphors2020
- Author(s)
  T. Yamamoto, M. G. Brik, M. Sagayama, Y. Togashi, M. Subhoni, U. Zafari
- Organizer
  PRiME2020
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K05065
[Presentation] Local Environment analysis of Mn ions in Mg2TiO42020
- Author(s)
  Y. Togashi, M. Subhoni, U. Zafari, M.G. Brik, and T. Yamamoto
- Organizer
  第30回日本MRS年次大会
- Data Source
  KAKENHI-PROJECT-20K05065
[Presentation] X-ray absorption near-edge structure analysis of magnetic elements in dilute magnetic materials2016
- Author(s)
  T. Yamamoto
- Organizer
  International Symposium on Frontier in Materials Science
- Place of Presentation
  Hanoi, Vietnam
- Year and Date
  2016-09-28
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26630325
[Presentation] Local environment analysis of dilute rare-earth dopants in phosphor materials2016
- Author(s)
  T. Yamamoto
- Organizer
  PRiME2016
- Place of Presentation
  Honolulu, USA
- Year and Date
  2016-10-02
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26630325
[Presentation] Co添加希薄磁性酸化物におけるCoの局所環境解析2016
- Author(s)
  大森祥輔，樽井健司，大森智裕，山本知之
- Organizer
  第19回XAFS討論会
- Place of Presentation
  名古屋大学
- Year and Date
  2016-09-03
- Data Source
  KAKENHI-PROJECT-26630325
[Presentation] Origin of room temperature ferromagnetism in dilute magnetic oxides2016
- Author(s)
  T. Yamamoto
- Organizer
  Khujand Symposium on Computational Materials and Biological Sciences
- Place of Presentation
  Khujand, Tajikistan
- Year and Date
  2016-09-25
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26630325
[Presentation] Local Environment Analysis of Mn Ions in CaTiO32015
- Author(s)
  T. Murai and T. Yamamoto
- Organizer
  第25回　日本MRS年次大会
- Place of Presentation
  横浜
- Year and Date
  2015-12-08
- Data Source
  KAKENHI-PROJECT-26630325
[Presentation] Local Environment Analysis of Fe Ions in BaZrO32015
- Author(s)
  J. Uchida and T. Yamamoto
- Organizer
  2nd International Symposium on Computational Materials and Biological Sciences
- Place of Presentation
  Nagoya, Japan
- Year and Date
  2015-09-01
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26630325
[Presentation] Core level spectroscopy (AES, XAS, EELS, XMCD)2015
- Author(s)
  T. Yamamoto
- Organizer
  22nd WIEN2k International Workshop
- Place of Presentation
  Singapore
- Year and Date
  2015-07-24
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26630325
[Presentation] Electronic Structure Analysis of 3d Transition Metal Doped SrTiO32015
- Author(s)
  T. Itokawa, Y. Saito and T. Yamamoto
- Organizer
  2nd International Symposium on Computational Materials and Biological Sciences
- Place of Presentation
  Nagoya, Japan
- Year and Date
  2015-09-01
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26630325
[Presentation] Substitution Mechanism of Mn ions in CaTiO32015
- Author(s)
  T. Murai, K. Mori, D. Yamada, H. Murata and T. Yamamoto
- Organizer
  2nd International Symposium on Frontiers in Materials Science
- Place of Presentation
  Tokyo, Japan
- Year and Date
  2015-11-19
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26630325
[Presentation] Electronic structure analysis of functional materials by synchrotron radiations and first-principles calculations2014
- Author(s)
  Tomoyuki Yamamoto
- Organizer
  Dushanbe Symposium on Computational Materials and Biological Sciences 2014
- Place of Presentation
  Dushanbe, Tajikistan
- Year and Date
  2014-09-24
- Invited
- Data Source
  KAKENHI-PROJECT-26630325
[Presentation] Local environment analysis of Co in CeO22014
- Author(s)
  Kenji Tarui, Tomohiro Oomori and Tomoyuki Yamamoto
- Organizer
  International symposium on nano-materials, technology, and applications
- Place of Presentation
  Hanoi, Vietnam
- Year and Date
  2014-10-08
- Data Source
  KAKENHI-PROJECT-26630325
[Presentation] X-ray absorption near-edge structure analysis for functional materials2014
- Author(s)
  Tomoyuki Yamamoto
- Organizer
  International symposium on nano-materials, technology, and applications
- Place of Presentation
  Hanoi, Vietnam
- Year and Date
  2014-10-08
- Invited
- Data Source
  KAKENHI-PROJECT-26630325
[Presentation] Electronic structure of magnetic elements in dilute magnetic materials2014
- Author(s)
  Tomoyuki Yamamoto
- Organizer
  Molecular Simulation Studies in Material and Biological Sciences 2014
- Place of Presentation
  Moscow, Russia
- Year and Date
  2014-09-22
- Invited
- Data Source
  KAKENHI-PROJECT-26630325
[Presentation] First-principles study of the mechanism of hydrogen incorporation in Mg2SiO42012
- Author(s)
  Tomoyuki Yamamoto
- Organizer
  AGU Fall Meeting 2012
- Place of Presentation
  SanFrancisco, USA
- Data Source
  KAKENHI-PUBLICLY-23103705
[Presentation] Influence of trace elements on the compression mechanism of Earth’s mantle2012
- Author(s)
  Tomoyuki Yamamoto
- Organizer
  Molecular Simulation Studies in Material and Biological Sciences 2012
- Place of Presentation
  Dubna, Russia
- Invited
- Data Source
  KAKENHI-PUBLICLY-23103705
[Presentation] 第一原理計算による含水ケイ酸マグネシウムの圧縮機構の検討2012
- Author(s)
  山本知之
- Organizer
  日本地球惑星科学連合2012年大会
- Place of Presentation
  幕張メッセ国際会議場
- Data Source
  KAKENHI-PUBLICLY-23103705
[Presentation] 第一原理計算による地球マントル物質に及ぼすプロトン存在の影響に関する研究2011
- Author(s)
  山本知之
- Organizer
  CMRC+高圧中性子合同研究会「中性子高圧科学とマルチプローブを用いた地球惑星研究」
- Place of Presentation
  KEK(茨城県)
- Year and Date
  2011-08-04
- Data Source
  KAKENHI-PUBLICLY-23103705

Yamamoto Tomoyuki 山本 知之

山本 知之 ヤマモト トモユキ

YAMAMOTO Tomoyuki 山本 知之

Research Projects

Research Products

アップコンバージョン型蛍光体によるペロブスカイト太陽電池の高効率化Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Development of high-efficiency up-conversion oxide phosphor material and the analysis of its light-emitting mechanismPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Study on the mechanism of ferromagnetism in dilute magnetic oxidesPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

第一原理計算による地球マントル物質に及ぼすプロトン存在の影響に関する研究Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

[Journal Article] Ab initio calculations of two-site occupation for substituting ions in MgTa2O6:Cr3+ phosphor: The geometric and electronic structures and optical transition energies2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] First-principles calculations of the electronic structure and mechanical properties of non-doped and Cr3+-Doped K2LiAlF6 under pressure2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] First-principles study of geometric and electronic structures, and optical transition energies of Mn4+ impurity ions: K2SiF6 as a prototype2023

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Geometrical and Electronic Structure Analysis of Mn‐Doped CaMO <sub>3</sub> (M?=?Ti, Zr, and Sn)2023

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Recent Progress in Nanostructured Functional Materials and Their Applications II2023

Author(s)

Journal Title

DOI

ISSN

Year and Date

Language

Data Source

[Journal Article] Influence of Isostatic Pressure on the Elastic and Electronic Properties of K2SiF6:Mn4+2022

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Influence of co-doping of divalent ions on the photoluminescence intensity of Mn4+ doped CaAl12O192022

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Theoretical and Experimental Investigations of Mn<sup>4+</sup> Site Occupation in CaAl<sub>12</sub>O<sub>19</sub>2021

Author(s)

Journal Title

DOI

Data Source

[Journal Article] First-principles investigations of geometrical and electronic structures of Mn4+ doped A2SiF6 (A= K, Rb, Cs) red phosphors2021

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Local environment analysis of Fe ions in BaMgSiO42016

Author(s)

Journal Title

Yamamoto Tomoyuki 山本知之

山本知之ヤマモトトモユキ

YAMAMOTO Tomoyuki 山本知之