Effect of A-Cation Radius on the Structure, Luminescence, and Temperature Sensing of Double Perovskites A₂MgWO₆ Doped with Dy³⁺ (A = Ca, Sr, Ba).

ABSTRACT: Herein, we report a case of A₂MgWO₆ (A = Ca, Sr, Ba) doped with 2%Dy³⁺, 2%Li⁺, in which the influences of the cation substitution are exhibited through the crystal structure, the charge transfer band (O^2--W⁶⁺), the emission spectrum, the color of the luminescence, and the luminescent decay time. The substitution of Ca²⁺ and Sr²⁺ ions for larger ions (Ba²⁺) led to the crystal structure alteration from cubic to monoclinic and tetragonal, respectively. These structure changes also lowered the crystallography symmetry site of Dy³⁺, tuned the color of the emitted light from the whitish to yellowish region, and caused a blue shift of the CTB. Furthermore, a significant decline in the lif

SUBMITTER: Vu THQ 

PROVIDER: S-EPMC10716894 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature