AI Article Synopsis
- The performance of transition metal dichalcogenides (TMDCs) relies heavily on the dielectric constant of the substrates they are placed on, which limits their use in various applications.
- A solution was developed using a low surface energy perfluorinated polyether (PFPE) self-assembled monolayer (SAM) to increase the distance between TMDCs and their substrates, reducing interactions.
- This approach led to improved device characteristics, such as lower subthreshold swing, higher photoluminescence intensity of excitons, and reduced substrate doping effects, thereby enhancing the potential applications of TMDCs.
Article 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.
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| http://dx.doi.org/10.1039/d4nr00061g | DOI Listing |
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