Fig. 4: Long-term plasticity of the photosynaptic device.
From: Organic molecular crystal-based photosynaptic devices for an artificial visual-perception system
a EPSC of the organic photosynaptic device for a presynaptic light spike input (white, 30 μW cm−2, and 50 ms). b Synaptic ΔW as a function of the white light spike intensity. The light spike width was fixed at 50 ms. c–e Schematic illustrations of the working principles of the organic photosynaptic device under strong light stimulation. f EPSC of the organic photosynaptic device for 30 white light spikes with a narrow pulse width of ~20 ms and a high frequency of ~50 Hz. g ΔW as a function of the number of input light pulses.
