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The green-emitting SrSi2O2N2:Eu2+ phosphors with single phase have been successfully synthesized by a simple two-step method. During the first-step process, Sr2SiO4:Eu3+ precursor was formed and emitted red light under UV light excitation. The excessive amount of Si3N4 in reactants promoted the formation of pure SrSi2O2N2 phase when molar ratio of Si3N4/Sr2SiO4 was located in the range of 1.1–1.5...
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