For the samples I-170 and I-110, the same modeling strategy was adopted, yielding satisfactory fits with realistic size parameters (Figure and). The inset 3D drawings in each panel in Figure were created maintaining the same aspect ratios from the parameters in Table . These insets show the general characteristics of the PNPls observed in the STEM images. SAXS data also show that synthesis at lower temperature yields narrower thickness/size distributions, reflected by the smaller standard deviation resulted from the models for these samples. This information is relevant from the SAXS perspective because the PNPls sampling number is much larger compared to STEM. This trend agrees with the optical properties from Figure . It is also noteworthy the presence of the diffraction of {101} crystallographic planes of perovskites at Q ≈ 1 Å -1 for all samples, confirming the crystalline phase of PNPls. Finally, considering the thickness extracted from the modelling in Table for Br-170 and I-110 and an interparticle distance of 5 nm from both STEM and SAXS (Table ), the thickness of the oleylammonium bilayer is approximately 3.2 nm.