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^*

Author Affiliations

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

show less

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

EndNote(RIS)

BibTex

Plain Text

show less

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

$\left. \begin{align} & \text{SrC}{{\text{O}}_{\text{3}}}\text{+ HAc + }{{\text{H}}_{\text{2}}}\text{O }\xrightarrow{\text{RT, in air}}\text{ Sr(Ac}{{\text{)}}_{\text{2}}}\ \text{solution + C}{{\text{O}}_{\text{2}}}\uparrow \text{ } \\ & \text{Mg(Ac}{{\text{)}}_{\text{2}}}\cdot \text{4}{{\text{H}}_{\text{2}}}\text{O + }{{\text{H}}_{\text{2}}}\text{O }\xrightarrow{\text{RT, in air}}\text{ Mg(Ac}{{\text{)}}_{\text{2}}}\ \text{solution} \\ & \text{Ce(N}{{\text{O}}_{\text{3}}}{{\text{)}}_{\text{3}}}\cdot 6{{\text{H}}_{\text{2}}}\text{O}\ \text{+ }{{\text{H}}_{\text{2}}}\text{O }\xrightarrow{\text{RT, in air}}\text{ Ce(N}{{\text{O}}_{\text{3}}}{{\text{)}}_{\text{3}}}\ \text{solution} \\ \end{align} \right\}$

(1)

View in Article

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

(2)