Emergent Soft System Research Team

Principal Investigator

PI Name Takao Someya
Degree Ph.D.
Title Team Leader
Brief Resume
1997Ph.D., Electronic Engineering, University of Tokyo
1997Research Associate, University of Tokyo
1998Lecturer, University of Tokyo
2001JSPS Postdoctoral Fellowship for Research Abroad (Columbia University)
2002Associate Professor, University of Tokyo
2009Professor, University of Tokyo (-present)
2011Project Leader, NEDO project on printed electronics (-present)
2011Research Director, JST/ERATO Project
2015Chief Scientist, Thin-film deice lab, RIKEN (-present)
2015Team Leader, Emergent Soft System Research Team, Supramolecular Chemistry Division, RIKEN Center for Emergent Matter Science (-present)

 

Outline

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.

Research Fields

Electronic Engineering, Materials Sciences

Keywords

Organic electronics
Organic field-effect transistor
Organic light emitting devices
Organic solar cells
Organic sensors

Results

Ultraflexible, high-performance and stable organic solar cells

One of the requirements of the Internet of Things—referring to a world where devices of all sorts are connected to the Internet—is the development of power sources for a host of devices, including devices that can be worn on the body. These could include sensors that record heartbeats and body temperature, for example, providing early warning of medical problems. In the past, attempts have been made to create photovoltaics that could be incorporated into textiles, but typically they lacked at least one of the important properties—long-term stability in both air and water, energy efficiency, and robustness including resistance to deformation—that are key to successful devices.

We have developed an ultraflexible organic photovoltaic (OPV) that achieves sufficient thermal stability of up to 120 °C and a high power conversion efficiency of 10% with a total thickness of 3 μm. Additionally, our ultraflexible organic solar cells exhibit prolonged device storage lifetime to >2,000 h at room temperature. Our ultraflexible OPVs possessing extraordinary thermal durability allow a facile bonding onto textiles through the hot-melt adhesive technology.

(Left) Ultraflexible organic solar cells manufactured on a 1 μm-thick plastic film.
(Right) Photograph of the washing process for the devices conforming to a dress shirt.

Members

Takao Someya

Team Leader takao.someya[at]riken.jp R

Kenjiro Fukuda

Senior Research Scientist

Kilho Yu

Postdoctoral Researcher

Wenchao Huang

Visiting Scientist

Yi-Lin Wu

Junior Research Associate

Hiroaki Jinno

Student Trainee

Hiroki Kimura

Student Trainee

Masahito Takakuwa

Administrative Part-time Worker II

Nahomi Hattori

Technical Staff II

Articles

お問い合わせ

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

TEL:+81-(0)48-467-9174

FAX:+81-(0)48-467-5348

E-mail:
takao.someya[at]riken.jp

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