Atomic-scale imaging of ytterbium ions in lead halide perovskites.

ABSTRACT: Lanthanide-doped lead halide perovskites have demonstrated great potential for photoelectric applications. However, there is a long-standing controversy about the existence of lanthanide ions, e.g., whether the doping of Ln³⁺ is successful or not; the substituting sites of Ln³⁺ in lead halide perovskites are unclear. We directly identify the doped Yb³⁺ in CsPbCl₃ perovskites by using the state-of-the-art transmission electron microscopy and three-dimensional atom probe tomography at atomic scale. Different from the previous assumptions and/or results, we evidence that Yb³⁺ simultaneously replace Pb²⁺ and occupy the lattice interstitial sites. Furthermore, we directly observe the cluster phenomenon of CsPbCl₃ singl

SUBMITTER: Xu W 

PROVIDER: S-EPMC10854428 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature