Unveiling Local Electronic Structure of Lanthanide-Doped Cs₂ NaInCl₆ Double Perovskites for Realizing Efficient Near-Infrared Luminescence.

ABSTRACT: Lanthanide ion (Ln³⁺ )-doped halide double perovskites (DPs) have evoked tremendous interest due to their unique optical properties. However, Ln³⁺ ions in these DPs still suffer from weak emissions due to their parity-forbidden 4f-4f electronic transitions. Herein, the local electronic structure of Ln³⁺ -doped Cs₂ NaInCl₆ DPs is unveiled. Benefiting from the localized electrons of [YbCl₆ ]^3- octahedron in Cs₂ NaInCl₆ DPs, an efficient strategy of Cl^- -Yb³⁺ charge transfer sensitization is proposed to obtain intense near-infrared (NIR) luminescence of Ln³⁺ . NIR photoluminescence (PL) quantum yield (QY) up to 39.4% of Yb³⁺ in Cs₂ NaInCl

SUBMITTER: Han S 

PROVIDER: S-EPMC9661838 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature