Optical and Optoelectrical Properties of Franckeite: A Naturally Occurring Van Der Waals Heterostructure
Abstract
Major Goals: The goal of this proposal was to study excitons and explore their physical properties in atomically thin van der Waals heterostructures (vdWHs) fabricated from a naturally occurring vdWH Franckeite with the long-term goal to explore new emergent physical phenomena and determine their suitability for quantum nanophotonic applications. Newly developed atomically thin van der Waals crystals, including graphene, hexagonal boron-nitride, and the dichalcogenide MoS2, reveal remarkable electrical, optical, and optoelectrical properties and show great promise for the development of novel nanoscale optoelectronic devices for the use in both civil and military applications. They offer a platform for tailoring the properties of materials by stacking different two-dimensional (2D) crystals to form vdWHs. These vdWHs are ideally suited to design functionalities at the atomically thin limit. Currently, vdWHs are fabricated synthetically by stacking different 2D van der Waals crystals vertically. This methodology is cumbersome as it relies on deterministic layer placement methods that have two major drawbacks: First, there is poor control over the crystal lattice orientation. Second, the presence of undesired adsorbates or air bubbles between the stacked layers damages the sample. These limitations are removed and new functionality is created, when nature is involved in stacking two different semiconducting layered materials, as is the case in Franckeite (Fr, Pb5Sn3Sb2S14). Although Fr provides a unique platform to study exciton behavior in a naturally occurring vdWH, to date little is known about the optoelectronic properties and excitons in Fr. This research will increase the understanding of the optical, optoelectrical and exciton behavior in Fr, which promises to opens new avenues for preparing designer materials.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 14, 2023
- Accession Number
- AD1223858
Entities
People
- A. K. Newaz
Organizations
- San Francisco State University