Highly efficient red-emitting Ca₂YSbO₆:Eu³⁺ double perovskite phosphors for warm WLEDs.

ABSTRACT: Highly efficient red-emitting Eu³⁺-doped double perovskite Ca₂YSbO₆ phosphors have been successfully prepared by the traditional high-temperature solid state method. The phase purity, photoluminescence and decay properties as a function of the Eu³⁺ concentration have been investigated in detail. The XRD results demonstrate that all of the obtained phosphors can be assigned to a pure monoclinic structure. Upon 464 nm excitation, a strong red emission situated at 614 nm (⁵D₀-⁷F₂) indicates that Eu³⁺ ions occupy a site with low symmetry. The quenching concentration of Eu³⁺ ions reaches as high as 70 mol% and the quenching mechanism is discussed. Especially, the prepared phosphor exhib

SUBMITTER: Liu M 

PROVIDER: S-EPMC9066002 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature