[17a-P01-1~66] 17 Nanocarbon and Two-Dimensional Materials (Poster)

English Presentation

[17a-P01-56] Electronic state modulation of MoS₂ using monovalent benzyl viologen solution

〇Mao Xu¹, Chen Li¹, Guanting Liu¹, Daisuke Kiriya¹ (1.The Univ. of Tokyo)

Keywords:

Transition metal dichalcogenides (TMDCs),Electronic state modulation

Two-dimensional (2D) semiconductors, especially transition metal dichalcogenides (TMDCs), offer a unique combination of electronic, optical, and mechanical properties, attracting a wide range of research attention. Thus, a variety of molecular systems such as neutral benzyl viologen (BV⁰) has been used to functionalize 2D TMDCs via non-covalent or covalent interactions, due to the incompatibility of TMDCs with current doping techniques, which can cause fatal flaws in the 2D crystal. Although BV⁰ proved an effective dopant through the charge transfer accompanied by the two-electron redox reductions at the interface formed with TMDCs, the effect of monovalent benzyl viologen (BV⁺) as an intermediate product therein has not been investigated. Therefore, this study focused on the interaction between BV⁺ and TMDCs (i.e., MoS₂), where a high-concentration BV+ solution was successfully prepared via forced electron supply achieved by electrochemical reactions, and was applied to electronic state modulation of MoS₂.