| 초록 |
Van der Waals (vdW) heterostructures based on various two-dimensional (2D) materials provide an unprecedented opportunity in designing new material systems because the lack of dangling bonds on the vdW surface has enabled the creation of high-quality heterointerfaces without the constraint of atomically precise commensurability. The recent advent of 2D vdW materials such as graphene, hexagonal boron nitride (h-BN) and transition metal dichalcogenides (TMDCs), combined with the ability to build artificial heterostructures, enables not only the fundamental investigation of quantum phenomena in low dimensional systems but also their applications for novel electronic and optoelectronic devices. In addition, organic materials that can be epitaxially assembled on the vdW surfaces of 2D materials offer another degree of freedom to create intriguing vdW heterostructures with other 2D materials. In this presentation, I will mainly discuss two interesting heterostructures based on inorganic/organic vdW systems: (1) atomically thin p-n heterojunctions fabricated by the vdW assembly of two semiconducting TMDC layers and (2) epitaxial heterostructures between the organic rubrene crystal and h-BN dielectric layers. We investigated the charge transport and optoelectronic properties in these vdW heterostructures, and found the unique characteristics compared with conventional material systems. |
