Centers & Labs

RIKEN Center for Emergent Matter Science

Emergent Soft System Research Team

Team Leader: Takao Someya (Ph.D.)
Takao  Someya(Ph.D.)

Electronics is expected to support the foundation of highly develop ICT such as Internet of Things (IoT), artificial intelligence (AI), and robotics. In addition to improve the computing speed and storage capacity, it is required to minimize negative impact of machines on environment and simultaneously to realize the harmony between human and machines. We make full use of the novel soft electronic materials such as novel organic semiconductors in order to fabricate emergent thin-film devices and, subsequently, to realize emergent soft systems that exhibit super-high efficiency and harmonization with humans. The new soft systems have excellent features such as lightweight and large area, which are complimentary to inorganic semiconductors, are expected to open up new eco-friendly applications.

Main Research Field


Related Research Fields



  • Organic electronics
  • Flexible electronics

Selected Publications

Papers with an asterisk(*) are based on research conducted outside of RIKEN.
  1. H. Jinno, K. Fukuda, X. Xu, S. Park, Y. Suzuki, M. Koizumi, T. Yokota, I. Osaka, K. Takimiya and T. Someya.
    "Stretchable and waterproof elastomer-coated organic photovoltaics for washable electronic textile applications",
    Nature Energy, DOI: 10.1038/s41560-017-0001-3
  2. A. Miyamoto, S. Lee, N. Cooray, S. Lee, M. Mori, N. Matsuhisa, H. Jin, L. Yoda, T. Yokota, A. Itoh, M. Sekino, H. Kawasaki, T. Ebihara, M. Amagai and T. Someya.
    "Inflammation-free, gas-permeable, lightweight, stretchable on-skin electronics with nanomeshes",
    Nature Nanotechnology, DOI: 10.1038/nnano.2017.125 (2017).
  3. Matsuhisa, N., Inoue, D., Zalar, P., Jin, H., Matsuba, Y., Itoh, A., Yokota, T., Hashizume, D., and Someya, T.;
    "Printable elastic conductors by in situ formation of silver nanoparticles from silver flakes"
    Nature Materials, DOI: 10.1038/NMAT4904 (2017).
  4. Fukuda, K.., and Someya, T.;
    "Recent Progress in the Development of Printed Thin-Film Transistors and Circuits with High-Resolution Printing Technology"
    Advanced Materials, DOI: 10.1002/adma.201602736 (2016).
  5. Jinno, H., Yokota, T., Matsuhisa, N., Kaltenbrunner, M., Tachibana, Y., and Someya, T.:
    "Low operating voltage organic transistors and circuits with anodic titanium oxide and phosphonic acid self-assembled monolayer dielectrics"
    Organic Electronics, 40, 58-64 (2016).
  6. Fukuda, K., Sekine, T., Shiwaku, R., Morimoto, M., Kumaki, D., and Tokito. S.:
    "Free-Standing Organic Transistors and Circuits with Sub-Micron Thicknesses"
    Scientific Reports, 6, 27450 (2016).
  7. *Kaltenbrunner, M., Sekitani, T., Reeder, J., Yokota, T., Kuribara, K., Tokuhara, T., Drack, M., Schwoediauer, R., Graz, I., Bauer-Gogonea, S., Bauer, S., and Someya, T.:
    "An ultra-lightweight design for imperceptible plastic electronics"
    Nature 499, 458–463 (2013).
  8. *Sekitani, T., Noguchi, Y., Hata, K., Fukushima, T., Aida, T., Someya, T.:
    "A Rubberlike Stretchable Active Matrix Using Elastic Conductors"
    Science, Volume 321, 1468–1472 (2008).
  9. *Someya, T., Kato, Y., Sekitani, T., Iba, Y., Noguchi, Y., Murase, Y., Kawaguchi, H., and Sakurai, T.:
    "Conformable, flexible, large-area networks of pressure and thermal sensors with organic transistor active matrixes"
    Proceedings of the National Academy of Sciences of the United States of America, Volume 102, 12321–12325 (2005).
  10. *Someya, T., Sekitani, T., Iba, S., Kato, Y., Kawaguchi, H., and Sakurai, T.:
    "A large-area, flexible pressure sensor matrix with organic field-effect transistors for artificial skin applications"
    Proceedings of the National Academy of Sciences of the United States of America, Volume 101, 9966–9970 (2004).

Lab Members

Principal Investigator

Takao Someya
Team Leader

Core Members

Kenjiro Fukuda
Research Scientist
Sungjun Park
Postdoctoral Researcher
Hiroaki Jinno
Junior Research Associate
Yi-Lin Wu
Junior Research Associate
Hiroki Kimura
Student Trainee

Contact information

W405 Cooperation Center,
2-1 Hirosawa,
Wako, Saitama
351-0198, Japan

Email: takao.someya [at]

Related links

Recent research results

December 22, 2017: RIKEN RESEARCH
Washable solar cells
September 19, 2017: Press Release
A solar cell you can put in the wash
September 15, 2017: RIKEN RESEARCH
Innovative electronics feels like a second skin