Ultrasensitive and Broadband MoS₂ Photodetector Driven by Ferroelectrics.

Wang, Xudong; Wang, Peng; Wang, Jianlu; Hu, Weida; Zhou, Xiaohao; Guo, Nan; Huang, Hai; Sun, Shuo et al. · Adv Mater · 2015

basic_science · Level V

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Abstract

A few-layer MoS2 photodetector driven by poly(vinylidene fluoride-trifluoroethylene) ferroelectrics is achieved. The detectivity and responsitivity are up to 2.2 × 10(12) Jones and 2570 A W(-1), respectively, at 635 nm with ZERO gate bias. E(g) of MoS2 is tuned by the ultrahigh electrostatic field from the ferroelectric polarization. The photoresponse wavelengths of the photodetector are extended into the near-infrared (0.85-1.55 μm).