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Transition metal dichalcogenides (TMDs) are anisotropic materials crystallizing in a graphite-like structure, with each layer consisting of an hexagonal plane of transition metal atoms sandwiched between two hexagonal planes of chalcogen atoms. The weak interlayer Van der Waals bonds can be broken to isolate stable two-dimensional (2D) crystals. A wide variety of techniques have been developed to...
A multitude of existing technologies are based on the ability of converting light into electrical signals. Graphene has demonstrated a number of optical and transport properties [1] which are promising for this type of optoelectronic applications and great efforts have been devoted to the development of graphene-based photodetectors. Being a gapless semiconductor, graphene enables light absorption...
The 2D semiconductor MoS2 in its mono‐ and few‐layer form is expected to have a significant exciton binding energy of several 100 meV, suggesting excitons as the primary photoexcited species. Nevertheless, even single layers show a strong photovoltaic effect and work as the active material in high sensitivity photodetectors, thus indicating efficient charge carrier photogeneration. Here, modulation...
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