Sensitivity Enhancement of Thermometry in Tb³⁺-Doped KY(CO₃)₂:Sm³⁺ by Energy Transfer.

ABSTRACT: Sm³⁺ and Tb³⁺ co-doped KY(CO₃)₂ temperature sensing materials were prepared via the hydrothermal method. X-ray diffraction results confirmed the monoclinic phase in KY(CO₃)₂:Sm³⁺,Tb³⁺ samples. In this KY(CO₃)₂ host, Tb³⁺ transfers energy to Sm³⁺ through cross-relaxation. Notably, a 20 mol% concentration of Tb³⁺ increases the emission intensity of Sm³⁺ by 7.1 times. The fluorescence emission intensities of ⁵D₄ (Tb³⁺) and ⁴G_5/2 (Sm³⁺) vary significantly with temperature. Both Sm³⁺-Sm³⁺ and Tb³⁺-Sm³⁺ pairs act as effective emission c

SUBMITTER: Sun S 

PROVIDER: S-EPMC11857944 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature