Optoelectronic wide-band-gap oxide-based memristor for mimicking human eye sensory perception and object tracking

Abstract

By integrating sensing, processing, and memory functionalities, the human sensory systems are extraordinarily energy and power efficient. Here, we report a ZnSnO (ZTO)/InO-based optoelectronic device that senses varying light intensities and perceives different motion behaviors. The device exhibits exceptional voltage-activated synaptic properties, encompassing features such as short-term and long-term plasticity, alongside notable light-sensitive characteristics that enable diverse light-triggered synaptic functions. Through simultaneous light and electrical voltage signals, we achieve light-enhanced/electrically erasing behavior, light-initiated paired-pulse facilitation (PPF), and learning-forgetting-relearning processes by tuning the 405 nm wavelength optical light. Furthermore, by manipulating charge dynamics through light intensity and duration, we replicate the basic sensing and perception function of the human eyes as a volatile receptor, showing potential for artificial retina applications. The device also demonstrates the capability to track objects and eye movement, holding promise for virtual reality systems.