Quantum Cutting in Ultraviolet B-Excited KY(CO₃)₂:Tb³⁺ Phosphors.

ABSTRACT: Highly efficient quantum cutting KY(CO₃)₂:Tb³⁺ phosphors excited by ultraviolet B (UVB) and ultraviolet C (UVC) were investigated. The structural and spectroscopic properties were characterized by XRD analysis and fluorescence spectrophotometry, respectively. The results showed that the monoclinic crystal structure of KY(CO₃)₂:Tb³⁺ remained in the Tb³⁺ doping range of 0~100%. In the excitation spectrum, two intense excitation peaks were observed in the ultraviolet range. Under the excitation of 283 nm, the maximum quantum efficiency of KY(CO₃)₂:0.7Tb³⁺ could reach 119%. However, the most efficient quantum cutting occurred at the ⁵K₈ excited state in the cross-

SUBMITTER: Li D 

PROVIDER: S-EPMC9457703 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature