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Mitigating substrate effects of van der Waals semiconductors using perfluoropolyether self-assembled monolayers.
- Source :
-
Nanoscale [Nanoscale] 2024 Jun 06; Vol. 16 (22), pp. 10779-10788. Date of Electronic Publication: 2024 Jun 06. - Publication Year :
- 2024
-
Abstract
- The properties of transition metal dichalcogenides (TMDCs) are critically dependent on the dielectric constant of substrates, which significantly limits their application. To address this issue, we used a perfluorinated polyether (PFPE) self-assembled monolayer (SAM) with low surface energy to increase the van der Waals (vdW) gap between TMDCs and the substrate, thereby reducing the interaction between them. This resulted in a reduction in the subthreshold swing value, an increase in the photoluminescence intensity of excitons, and a decrease in the doping effect by the substrate. This work will provide a new way to control the TMDC/dielectric interface and contribute to expanding the applicability of TMDCs.
Details
- Language :
- English
- ISSN :
- 2040-3372
- Volume :
- 16
- Issue :
- 22
- Database :
- MEDLINE
- Journal :
- Nanoscale
- Publication Type :
- Academic Journal
- Accession number :
- 38757983
- Full Text :
- https://doi.org/10.1039/d4nr00061g