Flexible Printed Organic Sensors and Thier Applications

IIn recent years, the realization of "Society 5.0" has been proposed, which employs many sensors in daily life. For this purpose, sensor systems that collect a wide variety of data are indispensable. The expectations of printed electronics are increasing as a new sensor manufacturing technology that can meet these social needs and create new, thin, flexible, and inexpensive sensor devices. This paper reports on various flexible organic sensors fabricated from functional organic materials on flexible plastic film substrates by employing printing methods. Two types of pressure sensors, based on piezoelectric and piezoresistive materials, a temperature sensor based on a conducting polymer, and humidity sensor based on cellulose nanofiber, will be reported. In addition, a flexible biosensor will also be demonstrated to detect lactate from perspiration without exercise. Finally, we will show the potential use of these sensors in healthcare and robotics applications.