Printed flexible memory devices using copper phthalocyanine

A novel, low cost printed organic data storage system was investigated. The printed memory devices consisted of top and bottom electrodes, an organic active layer, and a conductive polymer interfacial layer sandwiched in between the electrodes. The fabricated device demonstrated voltage induced switching and bi-stable electrical behavior, enabling it to function as non-volatile memory. An ON/OFF current or resistance ratio of up to 104 was demonstrated through dc characterization, while the ac impedance revealed a significant phase and resistance change between the ON and OFF states. The active materials can be readily implemented via graphic arts printing processes for large area flexible electronics.