Ultrasensitive monolayer-MoS2 heterojunction photodetectors realized via an asymmetric Fabry-Perot cavity
Ultrasensitive monolayer-MoS2 heterojunction photodetectors realized via an asymmetric Fabry-Perot cavity
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DOI：
10.1007/s40843-021-1955-0
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发表时间：
2022-03
期刊：
影响因子：
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通讯作者：
Xuexia Chen;Jinhao Zang;Xun Yang;Yuanjia Zhang;Yancheng Chen;Yue Zhao;Lin Dong;C. Shan
中科院分区：
文献类型：
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作者：
Xuexia Chen;Jinhao Zang;Xun Yang;Yuanjia Zhang;Yancheng Chen;Yue Zhao;Lin Dong;C. Shan
二维（2D）材料作为电子和光电子器件的有希望的候选者引起了显著的关注。然而，低吸收损害了基于少层2D材料的光电探测器（PD）的性能。在此，我们的目的是一个不对称的法布里-珀罗腔由一个介质层和金属薄膜，以增强光和单层二硫化钼（MoS 2）之间的相互作用。通过优化介质层的厚度，单层MoS 2异质结PD的外量子效率提高了两个数量级以上。单层MoS 2/氧化镍异质结PD具有2 × 105的大开/关比，703 A W−1的响应度和1.31 × 1015 Jones的探测率。探测率是有史以来报道的单层MoS 2异质结PD的最佳值。我们的研究结果可能为高性能2D材料为基础的PD铺平道路。
Two-dimensional (2D) materials have attracted significant attention as a promising candidate for electronic and optoelectronic devices. However, low absorption impairs the performance of few-layer 2D material-based photodetectors (PDs). Herein, we purpose an asymmetric Fabry-Perot cavity consisting of a dielectric layer and metallic film to enhance the interactions between light and monolayer molybdenum disulfide (MoS2). The external quantum efficiency of the monolayer MoS2heterojunction PD is enhanced by more than two orders of magnitudeviaoptimizing the thickness of the dielectric layer. The monolayer-MoS2/nickel oxide heterojunction PD exhibits a large on/off ratio of 2 × 105, a responsivity of 703 A W−1, and an ultrahigh detectivity of 1.31 × 1015Jones. The detectivity is the best value ever reported for monolayer-MoS2heterojunction PDs. Our results may pave the way for high-performance 2D material-based PDs.