Fig. 1: Optoelectrochemical synapse based on an n-type organic electrochemical transistor.
From: An optoelectrochemical synapse based on a single-component n-type mixed conductor
Schematic illustrations of (a) a biological synapse (left) and our transistor design that acts as an ion-tunable optoelectrochemical synapse (right). In the human visual system, communication between neurons occurs through synapses. The stimulation of the presynaptic membrane generates an action potential that results in the flow of ions towards the postsynaptic neuron. The OECT based synapse mimics this function by responding to external optical and electrical signals and converting them into a frequency encoded current output. In synapses, synaptic weight is responsible for learning and storing visual information and memory. b Chemical structure of p(C2F-z) with the microscope image of its film in the microscale OECT channel (length = 10 µm, width = 100 µm, d = 79 nm) and the lateral Au gate electrode. The schematic representation and a microscope image of the OECT are shown in Fig. S9a, b. c The transfer (ID–VG) and transconductance (gm–VG) characteristics of the p(C2F-z) OECT. VD = 0.6 V. d Comparison of p(C2F-z) device performance metrics (\(\mu\) and VTH) with those of other high-performance n-type OECTs. e Transient characteristics of p(C2F-z) OECT. The blue lines show the exponential fit with the corresponding turn ON and OFF speeds (τON and τOFF). f The operational stability of a p(C2F-z) OECT. VG pulses of 0.4 V with 10 s ON and 10 s OFF were applied for 3600 s at VD = 0.5 V. All device characteristics were recorded with an Ag/AgCl reference electrode used as the gate.
