Presentation Information
[7a-P05-58]Electrochemically Synthesized Viologen Radical for Degenerated Doping of MOSFETs
〇(D)Huiqin Liu1, Guanting Liu1, Daisuke Kiriya1 (1.Univ. of Tokyo)
Keywords:
semiconductor,doping,2D material
[Introduction] Two-dimensional inorganic materials (2D inorganic materials) have attracted significant attention due to their thin crystal structure and unique physical properties. To realize high-performance 2D semiconductor devices, the development of stable and controllable doping methods has become a critical challenge. Viologen molecules, a class of redox-active compounds, can undergo stepwise reduction and oxidation, enabling redox-tunable electronic states (Fig. 1). Notably, their radical cation form (V+) contains an unpaired electron, offering moderate electron donation ability and reversible transitions between oxidation states. Previously, the benzyl viologen radical (BV+) shows electron transfer ability for conducting polymers, suggesting viologen radicals as potential dopants for 2D materials. Furthermore, their redox-switchable nature offers a promising route for achieving reversible and externally tunable doping. However, the research of radical-based doping strategies for 2D materials remain limited. In this study, we electrochemically synthesized a viologen radical with alkyl side chains and evaluated its doping effect in a metal-oxide-semiconductor field-effect-transistor (MOSFET).