Breaking symmetry in device design for self-driven 2D material based photodetectors

• DOI: 10.1039/d0nr01326a
• Publication Date: 2020-03-10T01:43:13Z
• Authors: Qi Wang; Changjian Zhou; Yang Chai
• Keywords: Wearable Technology

The advent of graphene and other two-dimensional (2D) materials offers great potential for optoelectronic applications. Various device structures novel mechanisms have been proposed to realize photodetectors with unique detecting properties. In this minireview, we focus on a self-driven photodetector that has low-power or even powerless operation required in the internet things wearable electronics. To address general principle properties, propose elaborate concept symmetry breaking 2D material based photodetectors. We discuss various photodetectors, including asymmetrical contact engineering, field-induced asymmetry, PN homojunctions, heterostructures. Typical examples these are reviewed compared. performance current is critically assessed future directions discussed towards target application fields.