Optical Modification of TMD Heterostructures.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40044499.
- Also identified by DOI 10.1021/acs.nanolett.4c06512 and PMC identifier 11926954.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Optical modification is a fast, cost-effective, and scalable approach to tailoring the physical properties of two-dimensional (2D) materials for various applications. However, most previous efforts have focused on modifying individual 2D materials, which fails to utilize the method to its fullest potential. In this paper, heterostructures composed of hBN-capped molybdenum ditelluride (MoTe<sub>2</sub>) and molybdenum disulfide (MoS<sub>2</sub>) are optically modified with a continuous wave laser. The process simultaneously thins MoS<sub>2</sub> and induces clustering of tellurium atoms from the ablated MoTe<sub>2</sub>. These structural changes result in significant enhancements of the physical properties, including a 43-fold increase in MoS<sub>2</sub> photoluminescence and the transformation of the heterojunction into an anti-ambipolar transistor. These findings highlight a previously unutilized pathway to tune the heterostructure properties for applications in novel electronics and optoelectronics.