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. 2023 Jan 26;13:1454. doi: 10.1038/s41598-023-28505-3

Figure 3.

Figure 3

(a) Multi-level photocurrent states at LRS/HRS with typical blue light irradiation for 5 s followed by 20 s dark relaxation of eight cycles for ISHI-1 device. (b) Typical optoelectronic sensitivity at HRS after 5 s illumination and 200 s relaxation to achieve steady-state forgetting for the device. Inset shows the fitting result of the forgetting curve of the optoelectronic synapse during dark relaxation. (c) Pulse pair photo response under blue light irradiation, 5 s exposure with 5 s time intervals. (d) Photonic PPF index (IA2/IA1) with Δt between consecutive pulses with the simulated curve, inset showing the normalised transmittance spectra comparison of the ISHI-1 device with the commercial substrate.