The experimental realization of a non-volatile artificial synapse using organic polymers in a scalable fabrication process is provided. The three-terminal electrochemical neuromorphic device successfully emulates the key features of biological synapses: long-term potentiation/depression, spike-timing-dependent plasticity learning rule, paired-pulse facilitation, and ultralow energy consumption. The artificial synapse network exhibits excellent endurance against bending tests and enables a direct emulation of logic gates, which shows the feasibility of using them in futuristic hierarchical neural networks. Based on the demonstration of 100 distinct, non-volatile conductance states, high accuracy in pattern recognition and face classification neural network simulations is achieved.
FULLY-PRINTED ALL-SOLID-STATE ORGANIC FLEXIBLE ARTIFICIAL SYNAPSE FOR NEUROMORPHIC COMPUTING