Preparation of Cs-oleate: The CsPbBr3 NCs were synthesized based on the previously reported methods. Generally, cesium oleate solution was prepared by dissolving 40. Synthesis of CsPbBr3 NCs: Once PbBr2 was fully dissolved, the N₂ atmosphere was temporarily removed, and 0.4 mL of the previously prepared cesium oleate solution was swiftly injected into the lead precursor solution at 170 °C. Within 5 seconds, the reaction mixture was quenched by immersing the flask in an ice-water bath to rapidly reduce the temperature to below RT. The solution was then equilibrated to RT, ensuring the transition to a solution phase.