Phys.org June 28, 2022
Researchers in China presented the observation of the IXs in trilayer type-II staggered band alignment of MoS2/MoSe2/WSe2 van der Waals (vdW) HSs by photoluminescence (PL) spectroscopy. The central energy of IX is 1.33 eV, and the energy difference between the extracted double peaks is 23 meV. They confirmed the origin of IX through PL properties and calculations by the density functional theory and studied the dependence of the IX emission peak on laser power and temperature. The polarization-resolved PL spectra of HS were also investigated, and the maximum polarizability of the emission peak of WSe2 reached 11.40% at 6 K. According to the researchers the findings offer opportunities for the study of new physical properties of excitons in TMD HSs and therefore are valuable for exploring the potential applications of TMDs in optoelectronic devices…read more. TECHNICAL ARTICLEÂ
Credit: Nano Research (2022)Â