Vision-Inspired Optoelectronic Synaptic Transistors Based on P-Type SnO

Oxide semiconductor transistors are promising candidates for complementary vision neuromorphic systems. In this work, we present an optoelectronic synaptic transistor based on p-type tin monoxide, combined the optical stimulation with the electrical stimulation. The device synaptic behavior can be controlled by adjust optical spike intensity, duration time, frequency, cycle number, and gate voltage. Key synaptic functions, included paired-pulse facilitation, long term potentiation, long term depression, multiple memory module, and spike timing dependent plasticity, are demonstrated. The device exhibits a spike response time of 100 ms and an energy consumption of 4.1 nJ. By introduced the mod-synaptic neuron, we successfully implement Pavlovian conditioning and conditioned aversion learning. These devices can detect and process visual information in response to optical and electrical stimuli, highlighting their potential for applications in computer vision and hybrid sensory neuron systems.