HOME > Members > Kazuhiro Marumoto

Kazuhiro MARUMOTO, Professor

 

 

Date of Birth: August 6, 1968

Place of Birth: Hitachi, Ibaraki pref., Japan

Nationality: Japanese

 

Degree: Doctor of Science

Qualification: Preservation person in charge for High pressure gas production (Type: B class machinery, No.: 0423560019)

Hobby: Walking, Music

Sports: Kendo (Japanese fencing)

 

Education:

  • Bachelor of Science in Physics, Hokkaido University, Japan, March 1992  
  • Master of Science in Physics, Osaka University, Japan, March 1994 
  • Doctor of Science in Physics, Osaka University, Japan, March 1997 (Supervisor: Professor Yoshihito Miyako)

 

Professional appointments:

  • Assistant Professor, Department of Applied Physics, Nagoya University, Japan, April 1997 – December 2005
  • Associate Professor, Institute of Materials Science, University of Tsukuba, Japan, January 2006 – September 2011
  • Visiting Researcher, Japan Science and Technology Agency (JST), PRESTO, October 2009 - March 2013
  • Member, Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba, Japan, April 2011 - September 2017
  • Associate Professor, Division of Materials Science, University of Tsukuba, Japan, October 2011 - May 2022
  • Visiting Researcher, BEANS (Bio Electromechanical Autonomous Nano Systems), National Institute of Advanced Industrial Science and Technology (AIST), Japan, September 2012 - March 2013 
  • Visiting Researcher, National Institute for Materials Science (NIMS), Japan, February 2013 - March 2015
  • Visiting Researcher, AIST, Japan, October 2013 -
  • Member, Tsukuba Research Center for Energy Materials Science (TREMS), University of Tsukuba, Japan, October 2017 - May 2022
  • Professor, Division of Materials Science, University of Tsukuba, Japan, June 2022 - March 2023
  • Professor, Department of Materials Science, Institute of Pure and Applied Sciences, University of Tsukuba, Japan, April 2023 -
  • Member, R&D Center for Innovative Material Characterization, University of Tsukuba, Japan, June 2022 - March 2013
  • Director, Research Center for Organic-Inorganic Quantum Spin Science and Technology (OIQSST), University of Tsukuba, Japan, April 2024 -
  • Chair, Department of Materials Science, Institute of Pure and Applied Sciences, University of Tsukuba, Japan, April 2025 -
  • Advisor to the President, University of Tsukuba, Japan, April 2025 -


Awards:

  • BEST FACULTY MEMBER Award for 2024, University of Tsukuba, February 17, 2025.

  • Academic Award, The Society of Electron Spin Science and Technology (SEST), November 3, 2024

  • Longtime Employee Award, University of Tsukuba, October 10, 2017.
  • Evaluation Committee Award, Grants-in-Aid for Scientific Research, JSPS, October 31, 2014.
  • Young Investigator Award, The Society of Electron Spin Science and Technology (SEST), November 7, 2007.
  • Japan Society for the Promotion of Science (JSPS) Research Fellowship for Junior Scientists, April 1, 1996 - March 31, 1997.

 

Research achievements:

 

Major peer-reviewed papers:

  • "Operando spin observation elucidating performance-improvement mechanisms during operation of Ruddlesden–Popper Sn-based perovskite solar cells", Y. Chen, S. Yamaguchi, A. Sato, D. Xue and K. Marumoto, npj Flexible Electronics 9 (2025) 1.

  • "Microscopic analysis of low but stable perovskite solar cell device performance using electron spin resonance", X. Zou, T. Watanabe, H. Kimata, D. Xue, A. Shimazaki, M. A. Truong, A. Wakamiya and K. Marumoto, Communications Materials 5 (2024) 233.

  • "Open-Circuit-Voltage Improvement Mechanism of Perovskite Solar Cells Revealed by Operando Spin Observation", H. Kimata, S. Yamaguchi, T. Gotanda, D. Xue, H. Asai, A. Shimazaki, A. Wakamiya and K. Marumoto, ACS Applied Materials & Interfaces 15 (2023) 58539.

  • "Investigating the operation mechanism of light-emitting electrochemical cells through operando observations of spin states", J. Katsumata, F. Osawa, G. Sato, A. Sato, K. Miwa, S. Ono and K. Marumoto, Communications Materials 4 (2023) 41.

  • "Stability improvement mechanism due to less charge accumulation in ternary polymer solar cells", D. Xue, M. Saito, I. Osaka and K. Marumoto, npj Flexible Electronics 6 (2022) 22.
  • "Spin-states in MoS2 thin-film transistors distinguished by operando electron spin resonance", N. Tsunetomo, S. Iguchi, M. Wierzbowska, A. Ueda, Y. Won, S. Heo, Y. Jeong, Y. Wakayama and K. Marumoto, Communications Materials 2 (2021) 27.

  • "Deterioration mechanism of perovskite solar cells by operando observation of spin states", T. Watanabe, T. Yamanari and K. Marumoto, Communications Materials 1 (2020) 96.

  • “Molecular Oriented Charge Accumulation in High-Efficiency Polymer Solar Cells as Revealed by Operando Spin Analysis”, V. A. S. A. Rachmat, T. Kubodera, D. Son, Y. Cho and K. Marumoto, ACS Applied Materials & Interfaces 11 (2019) 31129-31138.

  • "Operando Direct Observation of Charge Accumulation and the Correlation with Performance Deterioration in PTB7 Polymer Solar Cells", T. Kubodera, M. Yabusaki, V. Rachmat, Y. Cho, T. Yamanari, Y. Yoshida, N. Kobayashi and K. Marumoto, ACS Applied Materials & Interfaces 10 (2018) 26434-26442.

  • "Direct Observation of Radical States and the Correlation with Performance Degradation in Organic Light-Emitting Diodes During Device Operation", G. Sato, D. Son, T. Ito, F. Osawa, Y. Cho and K. Marumoto, Physica Status Solidi A 215 (2018) 1700731. (Article-selected for cover art)

  • "Direct observation of dramatically enhanced hole formation in a perovskite-solar-cell material spiro-OMeTAD by Li-TFSI doping", M. Namatame, M. Yabusaki, T. Watanabe, Y. Ogomi, S. Hayase and K. Marumoto, Applied Physics Letters 110 (2017) 123904. (APL Editor's Pick, AIP Publishing in the News, Press release)
  • "Direct observation of electrically induced Pauli paramagnetism in single-layer graphene using ESR spectroscopy", N. Fujita, D. Matsumoto, Y. Sakurai, K. Kawahara, H. Ago, T. Takenobu and K. Marumoto, Scientific Reports 6 (2016) 34966.

  • "Direct Observation of UV-Induced Charge Accumulation in Inverted-type Polymer Solar Cells with a TiOx Layer: Microscopic Elucidation of the Light-Soaking Phenomenon", D. Son, T. Kuwabara, K. Takahashi and K. Marumoto, Applied Physics Letters 109 (2016) 133301.

  • “Electrically induced ambipolar spin vanishments in carbon nanotubes”, D. Matsumoto, K. Yanagi, T. Takenobu, S. Okada and K. Marumoto, Scientific Reports 5 (2015) 11859.
  • “Dramatic enhancement of fullerene anion formation in polymer solar cells by thermal annealing: Direct observation by electron spin resonance”, D. Liu, T. Nagamori, M. Yabusaki, T. Yasuda, L. Han and K. Marumoto, Applied Physics Letters 104 (2014) 243903.
  • “Direct observation of spins at bathocuproine (BCP) interfaces: An electron spin resonance study on BCP/metal (Al or Au) thin films”, Y. Matsuo, D. Son, Y. Shimoi and K. Marumoto, Chemical Physics Letters 607 (2014) 29. (Article-selected for cover art)
  • “Two-dimensional magnetic interactions and magnetism of high-density charges in a polymer transistor”, M. Tsuji, Y. Takahashi, Y. Sakurai, Y. Yomogida, T. Takenobu, Y. Iwasa and K. Marumoto, Applied Physics Letters 102 (2013) 133301.
  • “Direct Observation of Hole Accumulation in Polymer Solar Cells during Device Operation using Light-Induced Electron Spin Resonance”, T. Nagamori and K. Marumoto, Advanced Materials 25 (2013) 2362. (JST Press release)
  • “Charge Formation in Pentacene Layers During Solar-Cell Fabrication: Direct Observation by Electron Spin Resonance”, K. Marumoto, T. Fujimori, M. Ito and T. Mori, Advanced Energy Materials 2 (2012) 591. (JST Press release)
  • “Microscopic mechanisms behind the high mobility in rubrene single-crystal transistors as revealed by field-induced electron spin resonance”, K. Marumoto, N. Arai, H. Goto, M. Kijima, K. Murakami, Y. Tominari, J. Takeya, Y. Shimoi, H. Tanaka, S. Kuroda, T. Kaji, T. Nishikawa, T. Takenobu and Y. Iwasa, Physical Review B 83 (2011) 075302.
  • “Electron spin resonance and electron-nuclear double-resonance of photogenerated polarons in polyfluorene and its composite with fullerene”, K. Marumoto, M. Kato, H. Kondo, S. Kuroda, N. C. Greenham, R. H. Friend, Y. Shimoi and S. Abe, Physical Review B 79 (2009) 245204. (Article selected for Virtual Journal of Nanoscale Science & Technology 19(24) (2009))
  • “Spatial Extent of Wave Functions of Gate-Induced Hole Carriers in Pentacene Field-Effect Devices as Investigated by Electron Spin Resonance”, K. Marumoto, S. Kuroda, T. Takenobu and Y. Iwasa, Physical Review Letters 97 (2006) 256603. (Press release)
  • “Electron Spin Resonance of Field-Induced Polarons in Regioregular Poly(3-alkylthiophene) Using Metal-Insulator-Semiconductor Diode Structures”, K. Marumoto, Y. Muramatsu, Y. Nagano, T. Iwata, S. Ukai, H. Ito, S. Kuroda, Y. Shimoi and S. Abe, Journal of the Physical Society of Japan 74 (2005) 3066.
  • “Quadrimolecular recombination kinetics of photogenerated charge carriers in regioregular poly(3-alkylthiophene)/fullerene composites”, K. Marumoto, Y. Muramatsu and S. Kuroda, Applied Physics Letters 84 (2004) 1317.
  • “Nanoscale spatial extent of photogenerated polarons in regioregular poly(3-octylthiophene)”, K. Marumoto, N. Takeuchi and S. Kuroda, Chemical Physics Letters 382 (2003) 541.
  • “ESR studies of photogenerated polarons in regioregular poly(3-alkylthiophene)-fullerene composite”, K. Marumoto, N. Takeuchi, T. Ozaki and S. Kuroda, Synthetic Metals 129 (2002) 239. (Article-selected for cover art)
  • “Induced spin moments in quasi-one-dimensional halogen-bridged mixed metal complexes of nickel and palladium”, K. Marumoto, H. Tanaka, S. Kuroda, T. Manabe and M. Yamashita, Physical Review B 60 (1999) 7699.
  • “Kondo screening of uranium in the dilute system (UxLa1-x)Ru2Si2”, K. Marumoto, T. Takeuchi and Y. Miyako, Physical Review B 54 (1996) 12194.　


Membership of academic societies:

  • The Japan Photovoltaic Society, Full Member, 2021.5. - 　　
  • Organic EL Symposium of Japan, Full Member, 2010.4. - 　　
  • American Physical Society, Full Member, 2008.10. - 2016.09.
  • International EPR(ESR) Society (IES), Full Member, 2008.1. -
  • The Society of Electron Spin Science and Technology (SEST), Full Member, 2004.10. -
  • The Japan Society of Applied Physics, Full Member, 2002.1. -
  • The Society of Polymer Science, Japan, Full Member, 2001.7.- 2010.6.
  • Institute of Physics, Full Member, 2001.1. - 2004.8. 　
  • The Physical Society of Japan, Full Member, 1993.8. -


Activity of academic societies:

  • Vice President, Asia Pacific EPR/ESR Society (APES), 2024.10. -
  • Representative, The Society of Electron Spin Science and Technology (SEST), 2024.2. -
  • Organizing Committee, 12th Asia-Pacific EPR/ESR Society (APES) Symposium, 2024.1. -
  • International Advisory Board, International Conference on “Recent Trends and Innovations in Applied Sciences for Sustainable development of Environment (RTIAS-24), 2023.12. - 2024.01.
  • Guest Editors, Special issue in Physica Status Solidi (a) for Nano-Molecular Electronics (ICNME2022), 2022.5. -
  • Program Committee Members, 33rd International Photovoltaic Science and Engineering Conference (PVSEC-33), 2022.4. - 2023.03.
  • Organizing Committee Members, 2022 International Conference on Nano Molecular Electronics (ICNME2022), 2022.1. -
  • Organizer, Workshop: TIA “Kakehashi” on Organic/Inorganic Spin Electronics 2021.9 - 2022.12.
  • Organizing Committee, Symposium Organizer, Material Research Meeting 2021 (MRM2021), 2020.12. - 2021.12.
  • Organizing Committee, Symposium Organizer, MRM Forum 2020 Symposium, 2020.7. - 2021.1.
  • Organizing Committee, Symposium Organizer, Material Research Meeting 2020 (MRM2020), 2020.3. - 2020.7.
  • Director (General Affair), The Society of Electron Spin Science and Technology (SEST), 2020.2. - 2022.2.
  • General Affairs Committee Members, Joint conference of 22nd International Society of Magnetic Resonance Conference, 9th Asia-Pacific NMR Symposium (APNMR9), 60th Annual Meeting of the Nuclear Magnetic Resonance Society of Japan (2021), and 60th Annual Meeting of the Society of Electron Spin Science and Technology (ISMAR-APNMR-NMRSJ-SEST2021), 2019.2. - 2021.8.
  • Program Committee Members, Joint conference of 22nd International Society of Magnetic Resonance Conference, 9th Asia-Pacific NMR Symposium (APNMR9), 60th Annual Meeting of the Nuclear Magnetic Resonance Society of Japan (2021), and 60th Annual Meeting of the Society of Electron Spin Science and Technology (ISMAR-APNMR-NMRSJ-SEST2021), 2019.2. - 2021.8.
  • Organizing Committee, Executive Member, The International Conference on Molecular Electronics and Bioelectronics (M&BE10), 2018.11. - 2019.10.
  • Director (Finance), The Society of Electron Spin Science and Technology (SEST), 2018.1. - 2020.2.
  • Editorial Board Member, Scientific Reports, 2017.2. -
  • Organizing Committee Members, 12th International Conference on Nano-Molecular Electronics (ICNME2016), 2016.1. - 2021.12.
  • Representative, The Society of Electron Spin Science and Technology (SEST), 2016.1. - 2018.2.
  • Chief Editor, The Society of Electron Spin Science and Technology (SEST), 2015.11. - 2017.11
  • Organizing Committee Members, KJF International Conference on Organic Materials for Electronics and Photonics (KJF 2014), 2013.7. - 2016.6.
  • Editorial Board Member, The Society of Electron Spin Science and Technology (SEST), 2008.4. - 2022.2.