Temperature-Dependent Phonon Scattering and Photoluminescence in Vertical MoS₂/WSe₂ Heterostructures.

ABSTRACT: Transition metal dichalcogenide (TMD) monolayers and their heterostructures have attracted considerable attention due to their distinct properties. In this work, we performed a systematic investigation of MoS₂/WSe₂ heterostructures, focusing on their temperature-dependent Raman and photoluminescence (PL) characteristics in the range of 79 to 473 K. Our Raman analysis revealed that both the longitudinal and transverse modes of the heterostructure exhibit linear shifts towards low frequencies with increasing temperatures. The peak position and intensity of PL spectra also showed pronounced temperature dependency. The activation energy of thermal-quenching-induced PL emissions was estimated as 61.5 meV and 82.6 meV for WSe₂ and MoS₂, respectively. A

SUBMITTER: Ali W 

PROVIDER: S-EPMC10459064 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature