Research / 2021 / Article / Fig 1

Research Article

Retina-Inspired Organic Heterojunction-Based Optoelectronic Synapses for Artificial Visual Systems

Figure 1

Overview of a human visual system and the PQT-12/Ir(ppy)3 optoelectronic synapse. (a) Schematics of a human visual system. (b) Device structure of PQT-12/Ir(ppy)3 optoelectronic synapse modulated by multiple wavelengths of light and molecular structures of PQT-12 and Ir(ppy)3. (c) AFM image of the PQT-12/Ir(ppy)3 film on Si/SiO2 substrate. The insert is the roughness curve of the PQT-12/Ir(ppy)3 film surface. Transfer characteristics curves of the PQT-12/Ir(ppy)3 optoelectronic synaptic transistor with different (d) light-on and (e) light-off times with fixed wavelength of 540 nm at a constant of -10 V. (f) Transfer characteristics curves of the PQT-12/Ir(ppy)3 optoelectronic synaptic transistor with a fixed wavelength of 540 nm and different light densities (mW cm−2) at a constant of -10 V.

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