Strong suppression of emission quenching in core quantum dots coupled to monolayer MoS₂.

ABSTRACT: Non-radiative processes like energy and charge transfer in 0D-2D semiconductor quantum dot (QD)-transition metal dichalcogenides (TMDs) and other two-dimensional layered materials, like graphene and analogs, leading to strong quenching of the photoluminescence (PL) of the usually highly emissive QDs, have been widely studied. Here we report control of the emission efficiency of core QDs placed in close proximity to the monolayers of MoS₂. The QDs are transferred in the form of a high-density compact monolayer with the dot-dot separation, δ as well as the MoS₂-QD separation, d, being controlled through chemical methods. While at larger separations we observe some quenching due to non-radiative processes, at smaller separations we observe enhanced emission

SUBMITTER: Pradeepa HL 

PROVIDER: S-EPMC9419743 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature