Bioinspired TeSeO/InZnO Optoelectronic Synapse for Broadband UV-Visible-NIR Sensing and Multifunctional Reservoir Computing.
basic_science · Level V
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- Record sourced from PubMed, PMID 41545008.
- Also identified by DOI 10.1021/acs.nanolett.5c05934.
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Abstract
Neuromorphic visual systems, integrating broadband optical perception, memory, and computation, offer a promising pathway toward next-generation intelligent sensing and brain-inspired computing. Here, we report a TeSeO/InZnO heterojunction optoelectronic synaptic transistor that leverages a narrow-bandgap/wide-bandgap coupling strategy to achieve broadband photoresponse spanning from UV to NIR (360-1550 nm). Under UV-visible-NIR illumination, the device exhibits tunable synaptic functionalities, including excitatory postsynaptic current (EPSC), paired-pulse facilitation (PPF), and controllable memory transition processes. Moreover, the reservoir computing framework constructed on this device demonstrates a rich dynamic state space, achieving up to 93% accuracy in colored object recognition tasks. Furthermore, it effectively solves second-order nonlinear dynamical equations with a minimal normalized root-mean-square error of 4.19 × 10<sup>-4</sup>. This work establishes a material and device foundation for broadband neuromorphic visual perception and high-dimensional dynamic computing.