First, we reemphasize the fact that both ligands are necessary to solubilize solid PbBr2, which highlights the active role of both the ammonium and carboxylate species in this process. In this system, PbBr2 exhibits an inverse solubility behavior that is related to the decrease in the concentration of ammonium and carboxylate species when the temperature is increased, as has been previously demonstrated. In addition, we found that this binary ligand mixture can also dissolve CsPbBr3 NCs (Figure 3f−h). This phenomenon is in agreement with the strong Ostwald ripening effects that were observed during the NC growth.Accordingly, we found that Ostwald ripening could be suppressed by reducing the concentration of ligands, as is evidenced by the narrower size distributions of the NCs that were obtained following our strategy.