Tunable yellow–red emission performance of Dy${}^{3+}$, Mn${}^{4+}$: NaLaMgWO${}_6$ phosphors excited with 390-nm LED

The Dy${}^{3+}$, Mn${}^{4+}$: NaLaMgWO${}_6$ 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 Dy${}^{3+}$, Mn${}^{4+}$, Mg${}^{2+}$, Na${}^{+}$, La${}^{3+}$ and W${}^{6+}$ 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 Dy${}^{3+}$to Mn${}^{4+}$ are obtained, which shows good tunable yellow–red emission performance.