Dy³⁺ → Eu³⁺ Energy Transfer in SrLaGa₃O₇:Dy³⁺/Eu³⁺ Phosphors

In the presented research, we prepared dysprosium(Ⅲ)/europium(Ⅲ) doped SrLaGa3O7 phosphors via the calcinations at 1400 °C for 3 h and researched their characteristics using X-ray diffraction and fluorescence spectrophotometer. The dysprosium (III) → europium(III) energy transfers were surveyed and the mechanisms were discussed. The reducing dysprosium(III) luminescence and lifetimes following the enhancements of europium(III) concentration confirm the existence of dysprosium(III) → europium(III) energy transfer. In this process, the quadrupole-quadrupole interaction plays the key role. Exciting at 365 nm, dysprosium(III)/europium(III) codoped SrLaGa3O7 phosphors provide tunable luminescence by reason of the energy transfer process.