基于混合维度范德华异质结的光敏突触器件特性及机理研究

随着大数据、物联网以及人工智能领域的飞速发展，以突触电子学为基础的人工神经形态电子器件对探索高效、并行、快速的信息分布式存储及处理技术具有重要的研究意义和应用价值。本项目拟设计并构建二维/零维（2D/0D）混合维度范德华异质结光敏突触器件，突破传统电子突触器件在激发方式上的局限性和功能上的单一性；建立并完善2D/0D混合维度范德华异质结的光电转化机制，深入探讨光致栅控效应对异质结中光生载流子行为的主导作用，揭示2D/0D混合维度范德华异质结的光致存储特性及其调控方法；探索2D/0D混合维度范德华异质结晶体管实现类生物体光敏突触可塑性的物理机制及实现方法，通过光、电信号协同调控作用，模拟光激发下的神经形态信息传输和存储功能以及光调控下光遗传学启发的神经形态感知功能，最终获得可控的多功能光敏突触器件，为混合维度范德华异质结在人工神经形态电子器件中的应用提供一种可行的研究思路和实现途径。

With the rapid development of big data, internet of things and artificial intelligence, artificial neuromorphic devices based on synaptic electronics exhibit important research significance and application prospect for exploring efficient, parallel and fast information distributed storage and processing technology. In our project, we present a module of photosensitive synaptic device based on 2D/0D mixed-dimensional van der waals heterojunction, which breaks through the limitation of traditional electronic synapse device in excitation mode and the singleness of function. We will establish and optimize the theoretical model of photoelectric conversion process in as-fabricated van der waals heterojunction, and thoroughly investigate the dominant role of photo-gating effect in the dynamic response of photo-generated carriers, and then study its photo-induced memory characteristics as well as modulation methods. The synaptic plasticity achieved by 2D/0D mixed-dimensional van der waals heterojunction transistor will be investigated and the underlying physic mechanism will be also clarified. Through that synergistic regulation effect of light and electricity, we propose research strategies on light-stimulated neuromorphic information processing technology and light-modulated optogenetics-inspired neuromorphic intelligent perception technology. Finally, tunable and multifunctional artificial synaptic devices based on mixed-dimensional van der waals heterojunction will be fabricated, providing research methods and directions in the mixed-dimensional van der waals heterojunction enabled artificial neuromorphic devices.