Fig. 3: Short-term plasticity of the photosynaptic device.
From: Organic molecular crystal-based photosynaptic devices for an artificial visual-perception system
a EPSC triggered by a presynaptic light spike (white, 5 μW cm−2, and 120 ms). b EPSC as a function of the light pulse width. The white light spike was fixed at 5 μW cm−2. c Energy diagram showing the photoinduced charge transfer from the OMC to the oxygen-related level. d, e Schematic illustrations of the working principles of the organic photosynaptic device under weak light stimulation. f Postsynaptic current triggered by a pair of presynaptic light spikes. g PPF index as a function of Δtpost–pre.
