Journal of Inorganic Materials ›› 2022, Vol. 37 ›› Issue (8): 897-902.DOI: 10.15541/jim20210773

• RESEARCH ARTICLE • Previous Articles     Next Articles

Optical Absorption and Photoluminescence Spectra of Ce-doped SrMgF4 Polycrystalline with Superlattice Structure

LIU Qi(), ZHU Can, XIE Guizhen, WANG Jun, ZHANG Dongming, SHAO Gangqin()   

  1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
  • Received:2021-12-17 Revised:2022-04-07 Published:2022-08-20 Online:2022-04-07
  • Contact: SHAO Gangqin, professor. E-mail: gqshao@whut.edu.cn
  • About author:LIU Qi (1993-), male, Master. E-mail: liuqi19930126@163.com

Abstract:

Rare-earth (RE) ions doped perovskite-related fluorides are candidates for tunable optical materials. In this work, SrMgF4: xCe (x=0, 0.007, 0.013 and 0.035, in mole) powders were synthesized by a precipitation method. X-ray diffraction (XRD) patterns indicate that the obtained phosphors possess monoclinic superstructures. Electrovalence analysis confirms the existence of Ce3+/Ce4+ mixed valence. Two distinct fluorescence bands B and C were observed with different excitation wavelengths in the ultraviolet (UV) light region. Energy levels were modified strongly by the crystal field derived from monoclinic superstructures when the symmetry of Ce3+-polyhedra changed from high- to low- symmetry.

Key words: SrMgF4, Ce-doped, superstructure, perovskite, photoluminescence

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