Photoelectric Visual Adaptation Based on 0D‐CsPbBr3‐Quantum‐Dots/2D‐MoS2 Mixed‐Dimensional Heterojunction Transistor

异质结 适应(眼睛) 材料科学 量子点 晶体管 光电子学 计算机科学 光电效应 纳米技术 电压 物理 电气工程 光学 工程类
作者
Dingdong Xie,Liubo Wei,Min Xie,Leyong Jiang,Junliang Yang,Jun He,Jie Jiang
出处
期刊:Advanced Functional Materials [Wiley]
卷期号:31 (14) 被引量:121
标识
DOI:10.1002/adfm.202010655
摘要

Abstract Adaptation is the most common and basic feature of living systems, which gives species or individuals a survival advantage. In particular, visual adaptation can enable organisms with a clearer understanding of the real world, thereby avoiding potential harm, which is vital for the life activities of organisms. However, current adaptive devices based on logic circuits are still facing the great challenges for large‐scale integration and limited bionic functions. Therefore, the hardware impleofmentation of biological visual adaptability through the emerging photoelectric devices may provide a great opportunity for the bionic systems facing complex environments. Here, a novel adaptive device based on a mixed‐dimensional van der Waals heterostructure is fabricated by using a gate‐modulated 0D‐CsPbBr 3 ‐quantum‐dots/2D‐MoS 2 heterostructure. The device has superior electric adaptabilities and excellent optical absorption abilities owing to its special energy‐band structure. The key characteristics of biological adaptation, such as accuracy, sensitivity, inactivation, and desensitization behaviors, are successfully emulated in the device based on the unique trapping‐detrapping mechanism. Most importantly, with a photoelectric synergy approach, the fascinating visual adaptation function based on an environment‐adjustable threshold is finally demonstrated. These results indicate that the proposed device may be very promising for the future applications of artificial visual systems and intelligent bionic robots.
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