Huang Zhuohui, Tong Chuanjia, Zhao Yanbo, Jiang Leyong, Deng Lianwen, Gao Xiaohui, He Jun, Jiang Jie
Hunan Key Laboratory of Nanophotonics and Devices, School of Physics, Central South University, Changsha, Hunan 410083, China.
State Key Laboratory of Precision Manufacturing for Extreme Service Performance, College of Mechanical and Electrical Engineering, Central South University, Changsha, Hunan 410083, China.
Nanoscale. 2024 Sep 19;16(36):17064-17078. doi: 10.1039/d4nr02350a.
Color vision relies on three cone photoreceptors that are sensitive to different wavelengths of light. The interaction of three incident light wavelengths over time creates a fascinating color coupling perception, termed chromamorphic computing. However, the realization of this fascinating characteristic in semiconductor devices remains a great challenge. Herein, a mixed-dimensional optoelectronic transistor based on a novel metal nanocluster Au(SCH) and two-dimensional MoS van der Waals (vdWaals) heterojunction is proposed for chromamorphic visual-afterimage emulation with red-green-blue three-color spatiotemporal coupling perception. This distinguished molecular-like electronic level of Au nanoclusters allows the transistor to have visible light-sensitive properties, endowing it with the ability to perceive color information. Moreover, the chromamorphic functions are realized using a color spatiotemporal coupling approach. By utilizing the photogating effect of light stimulus, the device exhibits visual experience-dependent plasticity in accordance with the Bienenstock-Cooper-Munro (BCM) learning rule. Most importantly, for the first time, intriguing visual afterimages could be implemented using a color sensitization approach based on a close relationship between visual persistence and negative afterimages. These results represent an important step towards a new generation of intelligent visual color perception systems for human-computer interaction, bionic robots, .
色觉依赖于三种对不同波长光敏感的视锥光感受器。随着时间的推移，三种入射光波长的相互作用产生了一种迷人的颜色耦合感知，称为变色计算。然而，在半导体器件中实现这种迷人的特性仍然是一个巨大的挑战。在此，提出了一种基于新型金属纳米团簇Au(SCH)和二维MoS范德华（vdW）异质结的混合维度光电晶体管，用于具有红-绿-蓝三色时空耦合感知的变色视觉后像模拟。Au纳米团簇这种独特的类分子电子能级使晶体管具有可见光敏感特性，赋予其感知颜色信息的能力。此外，变色功能是通过颜色时空耦合方法实现的。利用光刺激的光门控效应，该器件根据比恩斯托克-库珀-蒙罗（BCM）学习规则表现出依赖视觉体验的可塑性。最重要的是，首次基于视觉暂留和负后像之间的密切关系，利用颜色敏化方法实现了引人入胜的视觉后像。这些结果代表了朝着用于人机交互、仿生机器人等新一代智能视觉颜色感知系统迈出的重要一步。
