Rare Earth Ion‐Doped CsPbBr3 Nanocrystals

Abstract Rare earth ions Eu 3+ and Tb 3+ are doped into CsPbBr 3 nanocrystals (NCs) for the first time, utilizing a one‐pot ultrasonication method. As‐synthesized NCs exhibit dual emissions from NCs and rare earth ions, further strengthening the competitiveness of perovskite NCs for lighting application.