Abstract Zn2GeO4:Mn2+ phosphors were synthesized by a solid state reaction in air condition. In the synthesis, MnCO3, MnO2 or KMnO4 was respectively used as manganese source material. The phase and… Click to show full abstract
Abstract Zn2GeO4:Mn2+ phosphors were synthesized by a solid state reaction in air condition. In the synthesis, MnCO3, MnO2 or KMnO4 was respectively used as manganese source material. The phase and luminescent properties of the synthesized Zn2GeO4:Mn2+ phosphors were investigated. All of the synthesized Zn2GeO4:Mn2+ phosphors show persistent luminescence under the excitation at 242 nm. There is only one emission band originating from the 4T1(4G) →6A1(6S) transitions of Mn2+, which suggests the self-reduction of Mn7+ or Mn4+ to Mn2+ in the synthesis. On the basis of luminescent properties of the synthesized Zn2GeO4:Mn2+ phosphors, we concluded that the self-reduction process is induced by the charge compensation mechanism.
Journal Title: Journal of Photochemistry and Photobiology A: Chemistry
Year Published: 2019
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