Abstract
With the advancement of technology based on low-dimensional materials, numerous attempts have been made to tune the semiconducting behavior of field-effect transistors to broaden their potential applications in various fields of electronics. Herein, a stable and site-selective method for the surface doping of tungsten diselenide devices is presented. Experimental results suggested that benzyl viologen doping induced a carrier-type transition effect on the device, and the electrical properties were successfully recovered after immersion in toluene solution. The recovered device was exposed to low-vacuum conditions for 10 d; no additional defects were observed on the interface.
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