Improvement of Luminescence Properties of Eulytite Single-Phase White Emitting Ca₃Bi (PO₄)₃: Ce³⁺/Dy³⁺ Phosphor.

ABSTRACT: To reduce the issue of tri-primary color reabsorption, a new approach for single-phase phosphors as light-emitting diodes (LEDs) has been recommended. The structures, morphology, photoluminescence, thermal stability, and luminescence mechanism of a variety of Ca₃Bi (PO₄)₃ (CBPO): Ce³⁺/Dy³⁺ phosphors were investigated. XRD characterization showed that all CBPO samples were eulytite structures. Furthermore, the energy transfer process from Ce³⁺ to Dy³⁺ in CBPO is systematically investigated in this work, and the color of light can be adjusted by changing the ratio of doped ions. Under UV light, energy is transferred from Ce³⁺-Dy³⁺ mainly through quadrupole-quadrupole interactions in the CBPO host, and doping with different Dy³⁺ concentrations tunes the emission color from blue to white. The thermal stability of the CBPO: 0.04Ce³⁺, 0.08Dy³⁺ samples is outstanding, and the CIE coordinates of the samples after emission have little effect with temperature, while their emission intensity at 423 K is as strong as that at room temperature, reaching 90%. The above results indicate that this CBPO material has great potential as a white light phosphor under near-UV excitation at the optimized concentration of Ce³⁺ and Dy³⁺.

SUBMITTER: Xu M 

PROVIDER: S-EPMC10343604 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature