Synthesis and characterization of Eu2+ activated X12Al10.6Si3.4O32Cl5.4 (X=Sr,Ca) phosphors

In this article, we have reported emission characteristics of Eu²⁺ activated Sr₁₂Al_10.6Si_3.4O₃₂Cl_5.4 and Ca₁₂Al_10.6Si_3.4O₃₂Cl_5.4 phosphors, prepared by combustion synthesis. The PL excitation was monitored at two different wavelengths 254 nm (mercury excitation) and 354 nm (mercury free excitation), which shows broad-blue emission bands at 432 nm, and 438 nm for 354 nm excitation wavelength. Under mercury excitation at 254 nm it shows emission wavelengths at 470 nm, 589 nm, 592 nm, and 617 nm for the prepared Sr₁₂Al_10.6Si_3.4O₃₂Cl_5.4 and Ca₁₂Al_10.6Si_3.4O₃₂Cl_5.4 phosphors. Further it was characterized by XRD, for the investigation of phase and purity of the phosphors. Thermal degradation of the phosphors was also studied at different temperatures.