Figure 5: PL characterization of polycrystalline MoS2 star with twin GBs.
From: Strain and structure heterogeneity in MoS2 atomic layers grown by chemical vapour deposition
(a) Optical image of a MoS2 star sitting on SiO2. (b) PL intensity mapping. The edges and twin GBs have a higher intensity (light yellow), while rest are depicted in orange. (c) PL peak position mapping. PL spectra are collected at the location marked five dots with different colours. (d) PL spectra collected from points indicated in c. Each spectrum corresponds to the location in c with the same color. (e,f) PL intensity and peak position line profiles as indicated by the white dash lines crossing two GBs and two edges.
