溶剂热法合成La1.9Y0.06Mo2O9∶Eu3+Sm3+荧光粉及其能量传递机理

doi:10.11896/cldb.18040010

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Abstract La_1.9Y_0.06Mo₂O₉∶Eu³⁺Sm³⁺ series phosphor powder was synthesized by solvothermal method with ethylene glycol as solvent. The crystal texture, morphology under different solvent ratios and the energy transfer mechanism of La_1.9Y_0.06Mo₂O₉∶Eu³⁺Sm³⁺ phosphor powder were researched through XRD, SEM and PL.The XRD results showed that: La_1.9Y_0.06Mo₂O₉∶Eu³⁺Sm³⁺ phosphor powder was the cubic structure of the space point group P123 with a high degree of crystallinity. The doping of rare earth ion and adding of solvent did not change the crystal structure of phosphor powder. SEM found that the sample was dandelion 3D spherical particle with net structure, thin wall, regular shape, uniform size and good dispersion. Its diameter was around 8 μm. In La_1.9Y_0.06Mo₂O₉∶Eu³⁺Sm³⁺ phosphor powder, the co-doping of Sm³⁺ effectively improved the concentration quenching of Eu³⁺. When the concentration of Eu³⁺ was 16%, fluorescence intensity reached the maximum value, and the concentration quenching occurred when the concentration was increased to 20%. At 465 mm excitation wavelength, 4f characteristic spectrum of Eu³⁺ was emitted, and La_1.9Y_0.06Mo₂O₉∶16%Eu³⁺3%Sm³⁺ was about 7 times intensity of La_1.9Y_0.06Mo₂O₉∶8%Eu³⁺. The fluorescence intensity was effectively enhanced by the doping of Sm³⁺. Meanwhile, the strong but narrow peak position at 591 nm and 616 nm did not change, electric dipole transition of⁵D⁰-⁷F² remained the strongest, and typical red light was emitted. And under the 405 nm stimulation, the 4f characteristic spectrum of Eu³⁺ was still emitted, which illustrated that the energy was effectively transferred to Eu³⁺, with the transfer efficiency of about 55%. The energy transfer belonged to dipole-dipole interaction (d-d).

Key words： solvothermal method dandelion 3D spherical particle Eu³⁺Sm³⁺ co-doping energy transfer concentration quenching

Published: 31 May 2019

CLC number:

TQ171

Fund:This work was financially supported by the National Natural Science Foundation of China (21205092), Higher Education Reform Project of Education Department of Shaanxi Provincial, China (17BY127), Key Science and Technology Program of Shaanxi Province, China (2017GY-178),Scientific Research Fundation of Shaanxi Province, China (16JK2091), Key Education Reform Projects of Xian University of Architecture and Technology Huaqing College (JG1701).

About author:: Hou Qiqingraduated from Xian University of Architectural Science and Technology in June 2010 with a masters degree in engineering. She is a lecturer at Xian University of Architectural Science and Technology Huaqing College. Her main research direction is synthesis and application of functional materials.Jiang Yuanru,professor of Xian University of Architectural Science and Technology, Standing Director of Shaanxi Chemistry Association, Deputy Director of Inorganic Chemistry Professional Committee. There are 8 national invention patents, 2 of which are the first inventors.There are 5 textbooks and monographs, and more than 80 papers published. Main research directions is functional material chemistry and environment-friendly process control.

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Cite this article:

HOU Qinqin,JIANG Yuanru,GAN Junyang, et al. Synthesis and Energy Transfer Mechanism of La_1.9Y_0.06Mo₂O₉∶Eu³⁺Sm³⁺ Phosphor by Solvent Thermal Method[J]. Materials Reports, 2019, 33(12): 1939-1944.

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http://www.mater-rep.com/EN/10.11896/cldb.18040010 OR http://www.mater-rep.com/EN/Y2019/V33/I12/1939

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