Abstract
A series of Zn1−xGa2S4:xMn2+ (0.005≤x≤0.08) phosphors has been synthesized by solid-state reaction at 950°C for 2h in a flowing H2S stream. The structural and photoluminescence properties of Zn1−xGa2S4:xMn2+ phosphors have been investigated. Under an excitation wavelength of λex=336nm, ZnGa2S4:Mn2+ exhibits a red emission band at about 612nm owing to the Mn2+4T1(4G)→6A1(6S) transition. The luminescence band shifts to longer wavelength and is accompanied by a decrease in decay time with increasing Mn2+ concentration. The maximum PL intensity of the phosphor is obtained at x=0.03. The critical transfer distance of Mn2+ is calculated as 21Å. The decay time for ZnGa2S4:0.03Mn2+ is 1.79ms. The calculated CIE coordinates indicate that ZnGa2S4:Mn2+ has good color purity. Mn2+-activated ZnGa2S4 phosphors have great potential for application in UV white LED and display devices.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
