A high-performance self-powered photodetector based on WSe2-graphene-MoTe2 van der Waals heterojunctions
A high-performance self-powered photodetector based on WSe2-graphene-MoTe2 van der Waals heterojunctions
复制标题
基于WSe2-石墨烯-MoTe2范德华异质结的高性能自供电光电探测器
DOI：
10.1039/d2tc01441f
复制
发表时间：
2022-06-01
影响因子：
6.4
通讯作者：
Gao, Liming
中科院分区：
文献类型：
--
作者：
Feng, Pu;He, Sixian;Gao, Liming
自供电光电探测器可以在没有外部电源的情况下检测光，这对于低功耗应用和节能至关重要。然而，实现高性能的自供电光电探测器仍然是一个挑战。在本文中，我们构建了一个新的WSe 2-石墨烯-MoTe 2货车德瓦尔斯异质结为基础的自供电光电探测器。这种自供电器件对550 nm光（10 mW cm（-2））具有优异的光响应，在零偏压下的响应率为40.84 mA W-1，检测率为1.21 x 10（11）Jones。此外，它具有10（3）的开/关比和在零偏压下在520 nm激光（1 μ W）下的μ s量级的光响应时间。我们相信，双肖特基结异质结使一个有前途的方法设计自供电光电探测器。
Self-powered photodetectors can detect light without an external power supply, which is critical for low-power applications and energy conservation. However, achieving high performance self-powered photodetectors remains a challenge. In this paper, we constructed a new WSe2-graphene-MoTe2 van der Waals heterojunction-based self-powered photodetector. This self-powered device shows excellent photoresponse to 550 nm light (10 mW cm(-2)) with a responsivity of 40.84 mA W-1 and a detectivity of 1.21 x 10(11) Jones at zero bias. Moreover, it has an on/off ratio of 10(3) and a photoresponse time on the order of mu s under a 520 nm laser (1 mu W) at zero bias. We believe that the dual-Schottky junction heterojunction enables a promising approach for designing self-powered photodetectors.