Giant photoluminescence enhancement in MoSe₂ monolayers treated with oleic acid ligands.

ABSTRACT: The inherently low photoluminescence (PL) yields in the as prepared transition metal dichalcogenide (TMD) monolayers are broadly accepted to be the result of atomic vacancies (i.e., defects) and uncontrolled doping, which give rise to non-radiative exciton decay pathways. To date, a number of chemical passivation schemes have been successfully developed to improve PL in sulphur based TMDs i.e., molybdenum disulphide (MoS₂) and tungsten disulphide (WS₂) monolayers. Studies on solution based chemical passivation schemes for improving PL yields in selenium (Se) based TMDs are however lacking in comparison. Here, we demonstrate that treatment with oleic acid (OA) provides a simple wet chemical passivation method for monolayer MoSe₂, enhancing PL y

SUBMITTER: Tanoh AOA 

PROVIDER: S-EPMC8276785 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature