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Artificial visual memory systems are attracting significant research attention to emulate the basic functions of the human visual system. However, currently, light detection via visual memory systems mainly focuses on ultraviolet light and single wavelength. Herein, a composite memristor (silicon p‐i‐n photodetector in series with p‐NiO/n‐ZnO heterostructure memristor) is designed and its detection–storage function is realized. The photodetector offers a wide range of detection from 300 to 1000 nm. Similar “learning‐experience” behaviors by light stimulation have been exhibited in the composite memristor. Moreover, different illumination wavelengths (350, 500, 650, and 900 nm) can provide different memory currents (Δ W = 2.4, 4.1, 6.6, and 4.9%, respectively), which benefits the detection–storage of different light information for a wide‐range visual memory simulation similar to the human visual system. This composite memristor opens up new avenue for constituting wider waveband versatile electronic eyes even beyond the visible light region.
Xiao et al. (Sat,) studied this question.
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