Retina‐Inspired Hemispherical Optoelectronic Memristor Based on Chlorophyll for Neuromorphic Color Vision

An optoelectronic synaptic device with multiwavelength modulated characteristics is an essential prerequisite to emulate the human retina for the neuromorphic color visual system. The inherent mechanical compliance of biomaterials enables conformal integration of optoelectronic memristors onto retina‐mimetic architectures, ensuring operational stability under dynamic curvature variations. In this work, a hemispherical optoelectronic memristor array with multiwavelength modulated synaptic plasticity is developed. The optoelectronic functional layer is consisted of zinc methyl 3‐devinyl‐3‐hydroxymethyl‐pyropheophorbide‐ a (ZnChl) and D ‐(+)‐glucose ( D ‐Glc). The distinguishable red, green, and blue light response can be demonstrated in a single device, which is attributed to the broadband spectral sensitivity of ZnChl and the electron trapping of D ‐Glc. Wide field of view is experimentally demonstrated owing to the device arrangement in hemispherical geometry. Furthermore, the device array successfully demonstrates color image sensing and memorization. More importantly, the artificial vision system based on optoelectronic synaptic devices can achieve a high recognition accuracy of 91.4% for color image. This work based on a chlorophyll‐ a derivative provides a new perspective for future high‐efficient neuromorphic vision.