Tunable Yellow-Red Emission via Energy Transfer in Dy3+, Mn4+: NaLaMgWO6 Phosphors for UV-Excited LED

Abstract

The Dy3+, Mn4+: NaLaMgWO6 phosphors are synthesized successfully using the technique of solid-state reaction at 1150 ℃. The XRD and SEM-EDS are measured to analyze the phase purity. The concentrations of Dy3+, Mn4+, Mg2+, Na+, La3+ and W6+ are measured by ICP. The absorption and excited spectra are presented, which indicate the 390 nm is suitable for the tunable yellow-red light excitation. Using the 390 nm LED as the excitation source, the emission spectra with different doped concentrations ratios of Dy3+to Mn4+ are obtained, which shows good tunable yellow-red emission performance.