Tunable green-yellow-red light properties of NaY(WO4)2: Mn2+, Dy3+, Eu3+ phosphors excited with 365 nm LED

By the solid-state reaction method, the NaY(WO4)(2) : Mn2+, Dy3+, Eu3+ phosphors are synthesized successfully. The sample's phase-structure and morphology have been characterized by XRD and EDS. The concentrations of Mn2+, Dy3+, Eu3+, Y3+ and W6+ are measured by ICP, The result implies that the doped process of Mn2+, Dy3+ and Eu3+ is very easy in host NaY(WO4)(2). The absorption and excited spectra are presented, The absorption spectrum of Mn2+ is always broad, but the Dy3+, Eu3+ has relatively sharp absorption peaks.Using the commercial LED of 365 nm wavelength as the excitation light, the emission spectra with different doped concentrations ratios of Mn2+ are obtained. The Mn2+ doping reduces the emission intensity of Dy3+, also it has meaningful influence on the tunable green-yellow-red LED.The high doped concentration of Mn2+ can guarantee the emission intensity of 546 nm enough.