Electronic devices using fibrous organic electrochemistry: from diode to transistor

Inspired by the brain, neuromorphic computing systems provide energy-efficient information processing, which makes them perfect for wearable technology. In wearable electronics, one-dimensional (1D) devices are becoming more and more popular because of their capacity to be integrated into electronic textiles and still perform under stress. In this study, we used poly(3-hexylthiophene) (P3HT) as the channel materials and a solid-state polymer electrolyte containing lithium bis-lithium bis-(trifluoromethanesulfonyl)imide (LiTFSI) to create fiber-based transistors and diodes. At low operating voltages, the fibriform diodes were able to achieve high rectification ratios with a high output current. Furthermore, by altering the device design, we successfully developed a fiber-based multi-synapse that can mimic important synaptic functions including excitatory postsynaptic current (EPSC), long- and short-term plasticity, long-term potentiation (LTP) and long-term depression (LTD).