TIPS-pentacene organic field-effect transistor for optoelectronic neuromorphic simulation

Abstract

Biological learning and memory of visual information are carried out through the regulation of synaptic weight by visual neuron synapses. Replicating the cognitive processes and light-induced adaptability of the human brain holds immense significance for the advancement of artificial intelli-gence. Here, we propose an organic photoelectric synaptic transistor based on 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS-pentacene). The device showcases a memory win-dow greater than 20 V and current on/off ratio of 106. Synaptic behavior transition is exhibited from short-term plasticity (STP) to long-term plasticity (LTP) under photoelectric pulse modulation, in-cluding paired-pulse facilitation (PPF), spike time dependent plasticity (STDP), spike number de-pendent plasticity (SNDP) and optical enhancement/electrical inhibition. In addition, we simulate the learning and adaptation process of the synaptic device after long-term light stimulation, and recognize visual information by perceiving light pulses in different time domains.