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Solid state synthesis and luminescence of Zn2GeO4:Mn2+ phosphors using MnO2 as manganese source material: self-reduction of Mn4+ to Mn2+

  • Liang ZhaoEmail author
  • Shuang Yao
  • Huayin Sun
  • Qian Huang
  • Tao Wen
  • Jing Du
Article
  • 25 Downloads

Abstract

We synthesized Zn2GeO4:Mn2+ phosphors using MnO2 as manganese source material by a solid state reaction in air condition. The Zn2GeO4:Mn2+ phosphors show green emission band corresponding to the 4T1 → 6A1 transitions of Mn2+. The green emission of Zn2GeO4:Mn2+ phosphors gives clear evidence for the substitution of Mn2+ to Zn2+ in Zn2GeO4 since Mn2+ presents green emission when it locates in a weak crystal field of four coordinated tetrahedron and there are only tetrahedral Zn2+ sites in Zn2GeO4. The existence of Mn2+ emission also suggests a self-reduction of Mn4+ to Mn2+ in the solid state reaction under air condition at high temperature. Based on the substitution in the phosphors, the self-reduction mechanism is speculated.

Notes

Acknowledgements

This work was supported by the Science and Technology Foundation of Chongqing Education Commission (Grant No. KJ1601217).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Liang Zhao
    • 1
    Email author
  • Shuang Yao
    • 1
  • Huayin Sun
    • 1
  • Qian Huang
    • 1
  • Tao Wen
    • 1
  • Jing Du
    • 2
  1. 1.School of Civil and Architectural EngineeringYangtze Normal UniversityChongqingPeople’s Republic of China
  2. 2.College of Materials and Mineral ResourcesXi’an University of Architecture and TechnologyXi’anPeople’s Republic of China

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