Preparation and luminescence property of Eu2+, Mn2+ co-doped silicates phosphors for white LED

By utilizing a versatile solution combustion synthesis (SCS) method, pure and well-crystallized Sr2MgSiO5:Eu2+, Mn2+ phosphors for white LED were successfully prepared. The results show that the obtained Sr2MgSiO5:Eu2+, Mn2+ phosphors have good crystallinity, and strong emission under near-ultraviolet (NUV) light excitation, which emits tri-band colors (blue, green, and red, RGB) peaking at 462, 535, and 668 nm, respectively. The emission spectrum with the peak at 462, 535 nm corresponds to the transition from the 4f(6)5d excited state to the 4f(7) ground state of Eu2+ ion, and the red emission band of 668 nm is attributed to T-4 -> (6)A transition of 3d(5) level of Mn2+ ions. It is suggested that the as-prepared nanostructure Sr2MgSiO5:Eu2+, Mn2+ samples as a single-host full-color phosphor have high potential for phosphor-converted white LEDs application. (C) 2015 Elsevier B.V. All rights reserved.