Organic photoelectrochemical memtransistor

Abstract

By emulating the intricate human brain, neuromorphic engineering is playing a pivotal role in reshaping artificial intelligence, with unique synaptic devices forming the cornerstone of its success. This work presents a proof-of-concept study of an organic photoelectrochemical memtransistor (OPECmT) with chemically tunable reconfigurability in fluids. Light stimuli can induce unique hysteretic behavior in this OPECmT. Through mediation by the actual neurotransmitter acetylcholine (ACh), we achieve the on-demand generation of excitatory/inhibitory postsynaptic currents and paired-pulse facilitation/depression with chemically adjustable weights. Notably, highly bionic Hebbian learning is realized in terms of nonlinearity and a millisecond time scale. To demonstrate the OPECmT’s application potential, an ACh-mediated artificial motion reflex arc is developed to mimic autonomous human movements.