Robust Organic–Inorganic Heterosynapses with High PPF and Broad Photoperception

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.