Ultrasmall CsPbBr₃ Blue Emissive Perovskite Quantum Dots Using K-Alloyed Cs₄PbBr₆ Nanocrystals as Precursors.

ABSTRACT: We report a colloidal synthesis of blue emissive, stable cube-shaped CsPbBr₃ quantum dots (QDs) in the strong quantum confinement regime via dissolution-recrystallization starting from pre-syntesized (K _x Cs_1-x )₄PbBr₆ nanocrystals which are then reacted with PbBr₂. This is markedly different from the known case of Cs₄PbBr₆ nanocrystals that react within seconds with PbBr₂ and get transformed into much larger, green emitting CsPbBr₃ nanocrystals. Here, instead, the conversion of (K _x Cs_1-x )₄PbBr₆ nanocrystals to CsPbBr₃ QDs occurs in a time span of hours, and tuning of the QD size is achieved by adj

SUBMITTER: Otero-Martinez C 

PROVIDER: S-EPMC11450558 | biostudies-literature | 2024 May

REPOSITORIES: biostudies-literature