Issue 18, 2022

Cr3+-Doped double perovskite antimonates: efficient and tunable phosphors from NIR-I to NIR-II

Abstract

Near-infrared (NIR) light devices have great potential in non-destructive testing and biomedicine fields. However, the lack of stable and efficient long wavelength NIR phosphors hinders their development. In this work, utilizing the compositional flexibility of antimonate double perovskites, we realized efficient and tunable broadband NIR emissions based on A2MSbO6:Cr3+ materials (A = Ca, Sr, and Ba; M = Ga, In, Sc, and Y). The NIR emission peaks ranged from 825 to 1010 nm by a composition modulation. In particular, Ca2ScSbO6:Cr3+ exhibits an 850 nm-centering broadband NIR emission with an internal quantum efficiency of 84.5% and a high thermal quenching temperature, retaining ∼71% at 410 K of the initial intensity at 80 K. Comparatively, Sr2InSbO6:Cr3+ with a 920 nm-centering broadband emission has 63.2% internal quantum efficiency. This work could help in discovering novel NIR phosphors with long-wavelength emissions and high efficiency.

Graphical abstract: Cr3+-Doped double perovskite antimonates: efficient and tunable phosphors from NIR-I to NIR-II

Supplementary files

Article information

Article type
Research Article
Submitted
20 Cax 2022
Accepted
14 Qad 2022
First published
15 Qad 2022

Inorg. Chem. Front., 2022,9, 4602-4607

Cr3+-Doped double perovskite antimonates: efficient and tunable phosphors from NIR-I to NIR-II

M. Zhao, S. Liu, H. Cai, F. Zhao, Z. Song and Q. Liu, Inorg. Chem. Front., 2022, 9, 4602 DOI: 10.1039/D2QI01093C

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