One-pot and large-scale production of uniform ytterbium-doped perovskite nanocrystals with controllable optical properties

Yb-doped lead halide perovskite nanocrystals (NCs) have attracted significant attention due to their outstanding optical properties. However, scaling up the synthesis remains a practical challenge. Here, we present a scalable method for producing monodispersed Yb3+:CsPbCl3 NCs by simply heating up mixed reactants. The particle size and Yb3+ doping concentration of the produced CsPbCl3 NCs can be effectively controlled. The resulting NCs exhibit exciton and Yb3+ emissions, both can be fine-tuned by modifying the annealing temperature and duration. Unlike classical size evolution modes, we revealed that the monodispersity was attributed to a two-step nucleation and digestive ripening process. With the capability to yield over ten grams of high-quality Yb3+:CsPbCl3 NCs, our work may suggest a synthetic approach for a wide range of applications and demonstrates an alternative mechanism for forming monodispersed perovskite NCs.