3 research outputs found
Temperature-Dependent Two-Dimensional Transition Metal Dichalcogenide Heterostructures: Controlled Synthesis and Their Properties
No full textVertically stacked and laterally
stitched heterostructures consisting
of two-dimensional (2D) transition metal dichalcogenides (TMDCs) are
predicted to possess novel electronic and optical properties, which
offer opportunities for the development of next-generation electronic
and optoelectronic devices. In the present work, we report the temperature-dependent
synthesis of 2D TMDC heterostructures on Si/SiO<sub>2</sub> substrates,
including MoS<sub>2</sub>–WS<sub>2</sub>, WS<sub>2</sub>–MoS<sub>2</sub>–WS<sub>2</sub>, Mo<sub>1–<i>x</i></sub>W<sub><i>x</i></sub>S<sub>2</sub>–WS<sub>2</sub>, and Mo<sub>1–<i>x</i></sub>W<sub><i>x</i></sub>S<sub>2</sub> alloyed bilayer heterostructures by ambient pressure
chemical vapor deposition (CVD). Raman and photoluminescence mapping
studies demonstrate that the as-produced heterostructures show distinct
structural and optical modulation. Our results indicate that the evolution
of various 2D heterostructures originates from the competition between
the adsorption and desorption of Mo atoms and the diffusion of W atoms
under various growth temperatures. This work sheds light on the design
and fabrication of heterostructures using controllable interfaces
and junctions of diverse TMDC atomic layers
