CsPbCl₃ → CsPbI₃ Exchange in Perovskite Nanocrystals Proceeds through a Jump-the-Gap Reaction Mechanism.

ABSTRACT: Halide exchange is a popular strategy to tune the properties of CsPbX₃ nanocrystals after synthesis. However, while Cl → Br and Br → I exchanges proceed through the formation of stable mixed-halide nanocrystals, the Cl ⇌ I exchange is more elusive. Indeed, the large size difference between chloride and iodide ions causes a miscibility gap in the CsPbCl₃-CsPbI₃ system, preventing the isolation of stable CsPb(Cl_xI_1-x)₃ nanocrystals. Yet, previous works have claimed that a full CsPbCl₃ → CsPbI₃ exchange can be achieved. Even more interestingly, interrupting the exchange prematurely yields a mixture of CsPbCl₃ and CsPbI₃ nanocrystals that coexist without undergoing furthe

SUBMITTER: Livakas N 

PROVIDER: S-EPMC10515632 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature