31st CEMS Colloquium


Dr. Takao Someya (Team Leader,Emergent Soft System Research Team, RIKEN CEMS)


17:30 - 18:30, September 30, 2015 (Wednesday)


Okochi-Hall, RIKEN


Ultraflexible organic thin-film devices for wearable and implantable electronics


We report recent progress of ultraflexible organic thin-film devices such as organic thin-film transistors (OTFTs), organic photovoltaic cells (OPVs), and organic light-emitting diodes (OLEDs) that are manufactured on ultrathin plastic film with the thickness of 1 μm. Ultraflexible organic transistor integrated circuits (ICs) exhibit extraordinary robustness in spite of being superthin. The electrical properties and mechanical performance of the transistor ICs were practically unchanged even when squeezed to a bending radius of 5 μm, dipped in physiological saline, or stretched to up to double their original size. These organic transistor ICs have been utilized to develop a flexible touch sensor system. Then, we have demonstrated OPV and OLED on 1 μm thick PEN. Moreover, the issues and the future prospect of flexible organic devices will be addressed. We will also describe emerging applications using ultraflexible and stretchable electronic systems in the fields of wearable and biomedical electronics.