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

Qi LIU; Can ZHU; Guizhen XIE; Jun WANG; Dongming ZHANG; Gangqin SHAO

doi:10.15541/jim20210773

Journals >Journal of Inorganic Materials >Volume 37 >Issue 8 >Page 897 > Article

Journal of Inorganic Materials
Vol. 37, Issue 8, 897 (2022)

Optical Absorption and Photoluminescence Spectra of Ce-doped SrMgF₄Polycrystalline with Superlattice Structure

Qi LIU, Can ZHU, Guizhen XIE, Jun WANG..., Dongming ZHANG and Gangqin SHAO^*|Show fewer author(s)

Author Affiliations

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

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DOI: 10.15541/jim20210773 Cite this Article

Qi LIU, Can ZHU, Guizhen XIE, Jun WANG, Dongming ZHANG, Gangqin SHAO. Optical Absorption and Photoluminescence Spectra of Ce-doped SrMgF₄Polycrystalline with Superlattice Structure [J]. Journal of Inorganic Materials, 2022, 37(8): 897 Copy Citation Text

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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.

Keywords

Ce-doped perovskite photoluminescence SrMgF4 superstructure

$\left.

\begin{aligned} SrC O_{3} + HAc + H_{2} O \overset{RT, in air}{\to} Sr(Ac)_{2} solution + C O_{2} ↑ \\ Mg(Ac)_{2} \cdot 4 H_{2} O + H_{2} O \overset{RT, in air}{\to} Mg(Ac)_{2} solution \\ Ce(N O_{3})_{3} \cdot 6 H_{2} O + H_{2} O \overset{RT, in air}{\to} Ce(N O_{3})_{3} solution \end{aligned}

\right\}$

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$\xrightarrow[\text{added dropwise},\text{ stirred, dried}\ \text{80 }\text{ for 48 h, in air}]{\text{+ N}{{\text{H}}_{\text{4}}}\text{H}{{\text{F}}_{\text{2}}}\text{(0}\text{.3 mol/L, +}\ \text{10wt }\!\!%\!\!\text{ ) + }{{\text{H}}_{\text{2}}}\text{O, }\!\!\tilde{\ }\!\!\text{ 0}\text{.15 mol/L}}$

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