Controllable, Wide-Ranging n-Doping and p-Doping of Monolayer Group 6 Transition-Metal Disulfides and Diselenides.

ABSTRACT: Developing processes to controllably dope transition-metal dichalcogenides (TMDs) is critical for optical and electrical applications. Here, molecular reductants and oxidants are introduced onto monolayer TMDs, specifically MoS₂ , WS₂ , MoSe₂ , and WSe₂ . Doping is achieved by exposing the TMD surface to solutions of pentamethylrhodocene dimer as the reductant (n-dopant) and "Magic Blue," [N(C₆ H₄ -p-Br)₃ ]SbCl₆ , as the oxidant (p-dopant). Current-voltage characteristics of field-effect transistors show that, regardless of their initial transport behavior, all four TMDs can be used in either p- or n-channel devices when appropriately doped. The extent of doping can be controlled by varying the concentr

SUBMITTER: Zhang S 

PROVIDER: S-EPMC6353705 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature