Electrostatic control of photoluminescence from A and B excitons in monolayer molybdenum disulfide.

ABSTRACT: Tailoring excitonic photoluminescence (PL) in molybdenum disulfide (MoS₂) is critical for its various applications. Although significant efforts have been devoted to enhancing the PL intensity of monolayer MoS₂, simultaneous tailoring of emission from both A excitons and B excitons remains largely unexplored. Here, we demonstrate that both A-excitonic and B-excitonic PL of chemical vapor deposition (CVD)-grown monolayer MoS₂ can be tuned by electrostatic doping in air. Our results indicate that the B-excitonic PL changed in the opposite direction compared to A-excitonic PL when a gate voltage (V _g) was applied, both in S-rich and Mo-rich monolayer MoS₂. Through the combination of gas adsorption and electrostatic doping, a 12-fol

SUBMITTER: Liu Y 

PROVIDER: S-EPMC9419104 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature