Gate-Tunable Hole and Electron Carrier Transport in Atomically Thin Dual-Channel WSe<sub>2</sub> /MoS<sub>2</sub> Heterostructure for Ambipolar Field-Effect Transistors.

Lee, Inyeal; Rathi, Servin; Lim, Dongsuk; Li, Lijun; Park, Jinwoo; Lee, Yoontae; Yi, Kyung Soo; Dhakal, Krishna P et al. · Adv Mater · 2016

basic_science · Level V

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Abstract

An ambipolar dual-channel field-effect transistor (FET) with a WSe<sub>2</sub> /MoS<sub>2</sub> heterostructure formed by separately controlled individual channel layers is demonstrated. The FET shows a switchable ambipolar behavior with independent carrier transport of electrons and holes in the individual layers of MoS<sub>2</sub> and WSe<sub>2</sub> , respectively. Moreover, the photoresponse is studied at the heterointerface of the WSe<sub>2</sub> /MoS<sub>2</sub> dual-channel FET.