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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. [ABSTRACT FROM AUTHOR]

Phototoxicity is an undesirable consequence of photodynamic and most sonodynamic therapies. In the current work, we showed that Er2O3 nanoplates can avoid being cytotoxic when exposed to light and could be an effective sonosensitizer. [ABSTRACT FROM AUTHOR]