Abstract
Two-dimensional (2D) van der Waals semiconductors have potential for various optoelectronic applications, owing to their unique optical and electrical properties at an atomic layer thickness. A stable excitonic emission from 2D monolayer semiconductors at room temperature, owing to a reduced dielectric screening effect, opens new fields of research on excitonics and valleytronics. Moreover, their low dimensionality without surface dangling bonds allows for unique quantum transport phenomena via artificial van der Waals stacking using a versatile library of 2D materials. In this article, the author introduces the tunable quantum optoelectronic properties of 2D semiconductors by manipulating native defects, van der Waals interfaces, Coulomb interactions, etc. Additionally, the author reviews the electronic and the optoelectronic applications utilizing such unique tunable properties of 2D semiconductors.
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