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Co-luminescence properties of terbium ions–benzoic acid–phen complexes doped with europium ions

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Rare Metals 2013年第6期32卷 599-604页

作者： Jing Zhang Li-Xi Wang Le Zhang Yan Chen Qi-Tu Zhang College of Materials Science and Engineering Nanjing University of Technology

Series of complexes Eux Tb1-x(BA)3phen(0.01 B x B 0.50)were synthesized by co-precipitation method,BA was used as the carboxylic acid ligand and 1,10-phenanthroline was used as the electrically neutral *** samples were characterized by means of X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),thermal gravimetric analyses and differential scanning calorimetry(TG–DSC),ultraviolet and visible spectrophotometer absorption spectra,and photoluminescence spectra to study the structure,the energy absorption,the thermal,and luminescent properties of the rare earth *** results show that the series rare earth organic complexes are well crystallized and show high thermal *** luminescent intensity of europium ion in the complexes increases as terbium ion transfers the absorbed energy to europium ion in the *** emission of terbium ion at 545 nm is not quenched by europium ion but increases with the content of europium ion *** the x value is 0.01,the fluorescence intensity reaches the maximum as well as the emission intensity of terbium ions at 545 nm and europium ions at614 nm are almost *** realizes the co-luminescence phenomenon of terbium ion and europium *** series rare earth organic complexes with different colors can be obtained by adjusting the ratio of terbium ion and europium ion.

关键词： Complexes Photoluminescence Rare earth luminescent intensity Co-luminescence

Synthesis and Properties of Eu_(3+) Activated Strontium Molybdate Phosphor

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Journal of Rare Earths 2007年第6期25卷 706-709页

作者：李旭杨志平关丽郭庆林怀素芳李盼来 Physics Science and Technology College Hebei University

In order to prepare fluorescent material for white Light Emitting Diodes （LEDs）, a new Eu^3＋ activated molybdate phosphor SrMoO4 was fabricated with solid-state method. X-ray diffraction （XRD） showed that the doping of trivalent europium ion reduced the lattice parameters. The excitation and emission spectra indicated that this phosphor could be excited effectively by the visible light, and then emitted red light with the peaks located at 616 and 624 nm. The influence of Eu^3＋ concentration on the luminescent properties of Eu^3＋ doped SrMoO4 was investigated and the 25% （mole fraction） was the appropriate molar concentration. The reaction time and temperature had obvious effect on the luminescent properties. The luminescent intensity reached the strongest when it was sintered at 800 ℃ for 3 h.

关键词： white light emitting diodes (WLED) red phosphor molybdate XRD luminescent intensity rare earths

Experimental optimum design and luminescence properties of NaY(Gd)(MoO_4)_2:Er^(3+)phosphors

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Chinese Physics B 2016年第6期25卷 201-205页

作者：孙佳石徐赛李树伟石琳琳翟梓会陈宝玖 Department of Physics Dalian Maritime University

Three-factor orthogonal design（OD） of Er3＋/Gd3＋/T（calcination temperature） is used to optimize the luminescent intensity of Na Y（Gd）（MoO4）2：Er3＋***,the uniform design（UD） is introduced to explore the doping concentration range of Er3＋/Gd3＋.Then OD and range analysis are performed based on the results of UD to obtain the primary and secondary sequence and the best combination of Er3＋,Gd3＋,and T within the experimental *** optimum sample is prepared by the high temperature solid state *** excitation and emission spectra of the optimum sample are *** intense green emissions（530 nm and 550 nm） are observed which originate from Er3＋2H11/2→4I15/2and4S3/2→4I15/2,*** effect is investigated in the optimum NaY（Gd3＋）（MoO4）2：Er3＋phosphors,and the green emission intensity decreases as temperature increases.

关键词： orthogonal design(OD) uniform design(UD) NaY(Gd)(MoO4)2 Er3+ luminescent intensity

Synthesis and co-luminescence properties of Tb^(3+)-methacrylic acid-1,10-phenanthroline complexes doped with Eu^(3+)

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Rare Metals 2012年第5期31卷 479-483页

作者： CHEN Yan ZHANG Jing ZHANG Le HAN Pengde WANG Lixi ZHANG Qitu College of Materials Science and Engineering Nanjing University of Technology Nanjing 210009 China

A series of rare earth complexes Tb_(1-x)Eu_x(MAA)_3phen(x=0.00, 0.01, 0.03, 0.05, 0.07, 0.09, 0.10, 0.30, and 0.50) were synthesized with MAA as the first ligand and phen as the second ligand. The complexes were characterized by means of FT-IR, thermogravimetry-differential scanning calorimetry (TG-DSC), XRD, UV absorption spectra, and photoluminescence spectra (PL). The results show that the luminescence intensity of Eu^(3+)increases as Tb^(3+) transfer the absorbed energy to Eu^(3+) in the complexes. The emission of Tb^(3+) at 545 nm is observed and increasing with x decreasing. When x=0.01, the luminescence intensity reaches the maximum value, and the emission intensity of Tb 3+ at 545 nm and Eu^(3+) at 614 nm are almost equal. It realizes the co-luminescence of Eu^(3+) and Tb^(3+) . We can obtain complexes with different colors by adjusting the ratio of Eu^(3+) to Tb^(3+) .

关键词： rare earths complexes luminescent intensity co-luminescence

Photoluminescence Characterization of NASICON Material

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稀有金属材料与工程 2006年第A3期35卷 535-537页

作者： Yuehua He Baofu Quan Ying Wang Chuanhui Cheng Fengmin Liu Biao Wang College of Electronic Science and Engineering Jilin University Changehun 130012 China School of Materials Science and Engineering Dalian Jiaotong University Dalian 116028 China

Besides gas sensitivity,NASICON (Na super ion conductor) material has luminescence *** this paper,the photoluminescence properties of NASICON and doped-NASICON material are *** NASICON material was synthesized by conventional sol-gel process,and doped with Er_2O_3,Tm_2O_3,Dy_2O_3,CsCl by 1%,3%,5% (mass ratio),*** ultraviolet light (325 nm,He-Cd laser) excited luminescent emissions of the resulted powders are recorded *** in the 330 nm to 650 nm *** main peak of the pure NASICON is found at the wavelength of 474 nm (blue light),the transition energy is 2.616 *** luminescent intensity is weakened obviously after doping with Er_2O_3 and Tm_2O_3,but is increased after doping with Dy_2O_3 and 3% CsCl.

关键词： photoluminescence NASICON luminescent intensity wavelength

Effect of calcinations temperature on the luminescence intensity and fluorescent lifetime of Tb^(3+)-doped hydroxyapatite(Tb-HA)nanocrystallines

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Journal of Materiomics 2017年第2期3卷 144-149页

作者： Hairong Yin Yanxiao Li Jianguang Bai Mingxin Ma Jing Liu School of Materials Science&Engineering Shaanxi University of Science&TechnologyXi'an 710021China

Hydroxyapatite luminescent nanocrystallines doped with 6 mol.%Tb^(3+)(Tb-HA)were prepared via chemical deposition method and calcined at different temperature,and the effects of calcinations temperature on the luminescence intensity and fluorescent lifetime were *** image of Tb-HA revealed that the shape of nanocrystallines changed from needle-like to short rod-like and sphere-like with the increase of calcinations temperature;while the particles sizes decreased from 190 nm to 110 *** crystallinity degree *** typical emission peaks attributed to Tb^(3+) ions were observed in emission spectra of 6 mol.%Tb-HA under 378 nm *** luminescent intensity of Tb-HA,which showed the fluorescence quenching,firstly enhanced and then decreased at 700℃;while the fluorescent lifetime increased firstly and then decreased after 600℃.Furthermore,the ratio of intensity between 545 nm and 490 nm corresponding to electric-dipole and magnetic-dipole transition(I_(R):I_(O))increases firstly and then decreases,which revealed that the proportion of substitute type and site of Ca^(2+) ions by Tb^(3+) ions were helpful to realize the substitute process and functional structure design.

关键词： Tb-HA Tb^(3+) Calcinations temperature luminescent intensity Fluorescent lifetime

Photoluminescence Characterization of NASICON Material

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稀有金属材料与工程 2006年第S3期 535-537页

作者： Yuehua He~1 Baofu Quan~1 Ying Wang~2 Chuanhui Cheng~1 Fengmin Liu~1 Biao Wang (1.College of Electronic Science and Engineering,Jilin University,Changchun 130012,China) (2.School of Materials Science and Engineering,Dalian Jiaotong University,Dalian 116028,China)

Besides gas sensitivity,NASICON （Na super ion conductor） material has luminescence *** this paper,the photoluminescence properties of NASICON and doped-NASICON material are *** NASICON material was synthesized by conventional sol-gel process,and doped with Er2O3,Tm2O3,Dy2O3,CsCl by 1%,3%,5% （mass ratio）,*** ultraviolet light （325 nm,He-Cd laser） excited luminescent emissions of the resulted powders are recorded *** in the 330 nm to 650 nm *** main peak of the pure NASICON is found at the wavelength of 474 nm （blue light）,the transition energy is 2.616 *** luminescent intensity is weakened obviously after doping with Er2O3and Tm2O3,but is increased after doping with Dy2O3and 3% CsCl.

关键词： photoluminescence NASICON luminescent intensity wavelength