121st General Meeting of the KCS

Type Symposium
Area The World of Nanomaterials Viewed through the Windows of Physical Chemists
Room No. Room 402
Time FRI 09:00-:
Code PHYS2-1
Subject Two-Dimensional Transition Metal Dichalcogenides for Future Electronics and Optoelectronics
Authors Youngdong Yoo
Department of Chemistry, Ajou University, Korea
Abstract Transition metal dichalcogenides (TMDCs) are layered materials that feature electronic properties comparable to those of conventional semiconductors. When TMDCs are thinned down to a single monolayer, their electronic structure and physical symmetries are radically altered, leading to new behavior such as indirect to direct bandgap transitions. Furthermore, modifying the coordination between the transition metal atom and chalcogen atoms can lead to new phases with radically different electronic properties. Because of these features, TMDCs have been considered as promising materials for future electronics and optoelectronics. To increase their potential uses in these applications, we have developed new chemical vapor deposition techniques for synthesizing novel TMDCs such as their two-dimensional heterostructures. Using a phase-selective synthetic strategy, we have synthesized in-plane few-layer 2H-1T′ MoTe2 junctions, which are new edge-contacted 2D materials, essential for high-performance 2D electronics. Furthermore, we have demonstrated a two-step strategy for synthesizing in-plane and vertical heterostructures composed of monolayer MoS2 and WS2, which could serve as new building blocks for future optoelectronics.
E-mail yyoo@ajou.ac.kr