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.