Graphene charge-injection photodetectors
Graphene charge-injection photodetectors
复制标题
石墨烯电荷注入光电探测器
DOI：
10.1038/s41928-022-00755-5
复制
发表时间：
2022-05-02
影响因子：
34.3
通讯作者：
Duan, Xiangfeng
中科院分区：
文献类型：
--
作者：
Liu, Wei;Lv, Jianhang;Duan, Xiangfeng
Photodetectors that offer broadband imaging from ultraviolet to mid-infrared can be created by using a silicon depletion well for charge integration, single-layer graphene for non-destructive direct readout and multilayer graphene for infrared photocharge injection.Charge-coupled devices are widely used imaging technologies. However, their speed is limited due to the complex readout process, which involves sequential charge transfer between wells, and their spectral bandwidth is limited due to the absorption limitations of silicon. Here we report graphene charge-injection photodetectors. The devices have a deep-depletion silicon well for charge integration, single-layer graphene for non-destructive direct readout and multilayer graphene for infrared photocharge injection. The photodetectors offer broadband imaging from ultraviolet (around 375 nm) to mid-infrared (around 3.8 mu m), a conversion gain of 700 pA per electron, a responsivity above 0.1 A W-1 in the infrared region and a fast response time under 1 mu s.
