Organic semiconductor based strain sensors for input system on flexible oleds

We developed an organic semiconductor based strain sensor sheet for an input system on flexible OLEDs. As resistors for strain gauges, we used a conductive polymer of poly (3, 4 - ethylenedioxythiophene) (PEDOT):polystyrenesulfonate (PSS) which is useful for touch input devices. This is because PEDOT: PSS has the advantages of flexibility and transparency. The strain sensor array was fabricated with the Parylene peel-off process. The resistance change of the fabricated PEDOT-based sensor was measured on diverse radii of curved surfaces. Finally, we demonstrated the capability to accept input by touching the sensor sheet both on flat and curved surfaces.