A high-performance bionic pressure memory device based on piezo-OLED and piezo-memristor as luminescence-fish neuromorphic tactile system

Abstract For the mimicry of biological neuromorphic tactile system, an intriguing challenge is how to produce a multi-functioning electronic devices of sensing force like skins and memorizing information like brains. However, current pressure sensors can only detect real-time force information, which vanishes after removing external stimulations, and present serious barriers in terms of the integrating demand of pressure sensors and memory elements as bionic pressure memory. Inspired by the luminescence-fish neuromorphic tactile system, a high-performance dual-excited pressure memory (DPM) device with the piezo-OLED array and piezo-memristor array is demonstrated in the present study. The DPM device can actively sense the tactile information and memorize the mapping images by transferring pressure signals to resistance signals as the bionic electronic-skin. Furthermore, this device with the double piezo structure for both photo- and potential-excitations can retain the memorized information with a high on/off ratio of ~810 and a stable storage of