Inkjet-printed flexible oxide photodetectors for scalable user interfaces

In today’s world of connectivity and automation, novel user interfaces are used to incorporate technology into our lives in a seamless way. Printed electronics provide the tools for making flexible and conformable electronic systems that can augment the functionality of everyday objects. However, compared to conventional, off-the-shelf devices, their performance is insufficient to obtain a functional and robust fully printed system. In this work, we are developing purpose-built photodetectors (PDs) for their use in an augmented paper platform, the Magic Bookmark. The developed PDs exhibit an on/off ratio of 0.2, resulting in a voltage swing of 200 mV, when connected to external circuitry, indicating suitability for the Magic Bookmark within high tolerances due to the readout scheme selected.