光电探测器
异质结
数码产品
可穿戴计算机
可穿戴技术
光电子学
石墨烯
领域(数学)
不对称
对称(几何)
计算机科学
物理
纳米技术
材料科学
电气工程
工程类
量子力学
嵌入式系统
数学
几何学
纯数学
作者
Qi Wang,Changjian Zhou,Yang Chai
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2020-01-01
卷期号:12 (15): 8109-8118
被引量:29
摘要
The advent of graphene and other two-dimensional (2D) materials offers great potential for optoelectronic applications. Various device structures and novel mechanisms have been proposed to realize photodetectors with unique detecting properties. In this minireview, we focus on a self-driven photodetector that has great potential for low-power or even powerless operation required in the internet of things and wearable electronics. To address the general principle of self-driven properties, we propose and elaborate the concept of symmetry breaking in 2D material based self-driven photodetectors. We discuss various mechanisms of breaking symmetry for self-driven photodetectors, including asymmetrical contact engineering, field-induced asymmetry, PN homojunctions, and PN heterostructures. Typical device examples based on these mechanisms are reviewed and compared. The performance of current self-driven photodetectors is critically assessed and future directions are discussed towards the target application fields.
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