RETRACTED: Preparation of Eu2+-Mn2+ co-activated M3MgSi2O8-M2SiO4 (M = Ca, Ba) composite and their photoluminescence properties (Retracted Article)

A new kind of Eu2+-Mn2+ co-doped M3MgSi2O8-M2SiO4 (M = Ca, Ba) full-color phosphor was synthesized through a modified solid-state reaction method using BaCl2 as flux. The effects of BaCl2 flux contents, Eu2+ and Mn2+ ions doping concentration, and calcination time on crystal structure and luminescent properties were studied. Results indicated that the main structure of phosphor is a mixture phase of BaCa2MgSi2O8 and Ba1.31Ca0.69SiO4, and the optimum single doping concentration of Eu2+ is 4 mol%. Upon the excitation of 365 or 398 nm near UV light, Eu2+ Mn2+ co-doped phosphor showed two successive spectra with blue-green-emitting in the 430-550 nm range and red emitting in the 560-630 nm range, attributing to the 4f(6)5d(1)-S-8(7/2) transition of Eu2+ and the T-4(1)-(6)A(1) transition of Mn2+, respectively. From the strong absorption in near UV zone from 250 to 450 nm, Eu2+ Mn2+ co-doped composite can be used as potential candidate for white light emitting diodes (w-LEDs). (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.