Robust Organic–Inorganic Heterosynapses with High PPF and Broad Photoperception

Abstract Hybrid heterostructures are promising neurotransmitter platforms for photonic synapses in bioinspired optoelectronics. Organic–inorganic heterostructures have the features of a wide photoresponse and wet synthesis but still face poor stability and limited comprehensive performance. Here, it has been reported ultrastable and broadband photonic synaptic behaviors from solution‐processed cross‐linked conjugated polymer/zinc oxide nanorod heterostructures, which can be formed by in situ polymerization and hydrothermal methods. Light‐tunable synaptic function enables neuromorphic behaviors, such as high paired‐pulse facilitation, short‐ and long‐term plasticity, over the UV‐to‐visible spectral range. Impressively, the heterosynapse can maintain clear synaptic plasticity after being annealed in ambient air at 300 °C, showing robust thermal stability in harsh conditions. Moreover, visual perception and recognition can be mimicked with our synapse arrays, providing a reliable pathway to construct stable neurotransmitters toward practical neuromorphic optoelectronics.