Engineering van der Waals Heterojunctions for Electronic and Optoelectronic Device Applications

Abstract

Efficient preparation and characterization of layered materials and their van der Waals heterojunctions lay the foundation for various opportunities in both fundamental studies and device applications. The vast library of 2D materials displays a range of electronic properties, including conductors, semiconductors, insulators, semimetal, and superconductors, and shows strong light-matter interaction. The fact that each layer in the layered material is bonded via van der Waals interaction opens up the possibility of assembling different layers arbitrarily without any consideration over the precision of lattice match- ing. This unique stacking with one-atomic-plane precision can unfold diverse van der Waals heterostructure devices by efficiently engineering its energy band alignment. newline