Enhancing luminescence of Lu{sub 2}MoO{sub 6}:Eu{sup 3+} phosphors by doping with Li{sup +} ions for near ultraviolet based solid state lighting

Journal Article · Wed Jun 15 04:00:00 EDT 2016 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2016.02.006· OSTI ID:22581551

Li, Li ^[1]; Shen, Jun; Pan, Yu; Zhou, Xianju; Huang, He; Chang, Wenxuan; He, Qiwei ^[1]; Wei, Xiantao ^[2]

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1. School of Sciences, Chongqing University of Posts and Telecommunications, Chongqing 400065 (China)
2. Department of Physics, University of Science and Technology of China, Hefei 230026 (China)

Graphical abstract: The emission spectra of Lu{sub 2}MoO{sub 6}:3%Eu{sup 3+}, x%Li{sup +} phosphors under 365 nm excitation. The inset represents emission intensity of 610 nm as a function of Li{sup +} molar concentration. - Highlights: • Lu{sub 2}MoO{sub 6}:3%Eu{sup 3+}, x%Li{sup +} phosphors were synthesized by solid-state reaction method. • All the prepared phosphors can be assigned to its monoclinic phase. • The optimal concentration of Li{sup +} ions is 30mol%. • The luminescent intensity of Lu{sub 2}MoO{sub 6}:Eu{sup 3+} phosphors has been greatly enhanced by codoping Li{sup +} ions. - Abstract: Lu{sub 2}MoO{sub 6}: 3% Eu{sup 3+} co-doped with x% Li{sup +} (x = 0–40 mol) phosphors were synthesized by high-temperature solid-state reaction method. The structure and luminescent properties of these phosphors were investigated. The X-ray diffraction (XRD) results show that all prepared phosphors can be assigned to monoclinic phase and codoping with Li{sup +} ions does not change their crystallographic structure. The excitation and emission spectra show that the samples can be effectively excited by the near ultraviolet light at 365 nm and exhibit strong red emission centered at 610 nm. The experimental results indicate the red luminescent intensity of Lu{sub 2}MoO{sub 6}:Eu{sup 3+} phosphors has been greatly enhanced by codoping with Li{sup +} ions. The enhancement of the luminescent intensity can be the consequence of the modification of the local field symmetry around the Eu{sup 3+} ion, improved crystallization, and the enlarged grain size induced by the Li{sup +} ions.

• OSTI ID: 22581551
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 78; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
CONCENTRATION RATIO
CRYSTAL STRUCTURE
CRYSTALLIZATION
CRYSTALS
DOPED MATERIALS
EMISSION SPECTRA
EUROPIUM IONS
GRAIN SIZE
LITHIUM IONS
LUMINESCENCE
LUTETIUM COMPOUNDS
MOLYBDATES
MONOCLINIC LATTICES
PHOSPHORS
ULTRAVIOLET RADIATION
X-RAY DIFFRACTION