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Xiao L.J.,Shenyang University of Chemical Technology | Xie Y.,Shenyang University of Chemical Technology | He M.R.,Shenyang Supervision and Inspection Institute for Product Quality | Chen Y.J.,Shenyang University of Chemical Technology | And 2 more authors.
Journal of Nanoscience and Nanotechnology | Year: 2014

BaAI12O19:Tb, Dy phosphor was prepared by the sol-gel technique using citric acid as a com-plextant. XRD was used to characterize the relevant crystallization behavior of the phosphor. The luminescence properties and energy transfer between Tb3+ and Dy3+ were investigated. The results revealed that energy transfer exists between Dy 3+ and Tb3+ at appropriate Tb3+ concentrations. The emission intensity of Tb3+ increases and energy transfer happens from Dy3+ to Tb3+ ions at the higher content of Tb 3+ when Tb3+ and Dy3+ ions were co-doped. BaAI12O19 phosphors doped with Tb3+ or Dy 3+ ions only were studied to compared with BaAI12O 19:Tb, Dy phosphors. The results showed that the maximum excitation peak of BaAI12O19:Tb is 240 nm and the emission spectrum consists of four peaks at 490, 545, 590, and 625 nm, originating from 5D4 →7Fj (J = 6, 5, 4, 3) transitions of Tb3+ ion, respectively. The excitation peaks of BaAI12O19:Dy are at 291, 324 nm and the emissions of Dy3+ are at 370, 447 and 578 nm, originating from 4F 9/2 → 6P5/2, 4F9/2 → 6H15/2 and 4F9/2 → 6H13/2 transitions of Dy3+ ion, respectively. Copyright © 2014 American Scientific Publishers All rights reserved.


Liu X.-F.,Shenyang University of Chemical Technology | Xiao L.-J.,Shenyang University of Chemical Technology | He M.-R.,Shenyang Supervision and Inspection Institute for Product Quality | Xie Y.,Shenyang University of Chemical Technology | And 3 more authors.
Faguang Xuebao/Chinese Journal of Luminescence | Year: 2010

The red phosphor of CaSnO3:Eu3+ powders were prepared by sol-gel method. During the preparation, PEG (10000) as is the surfactant was added in CaSnO3:Eu3+ phosphor. The influence of PEG(10000) on crystal structure, particle size, morphology and luminescent properties of the phosphor were investigated by means of X-ray diffraction (XRD), laser particle size analyzer, scanning electron microscopy (SEM) and the fluorescence spectrophotometer. The results showed that the structure of CaSnO3:Eu3+ is not changed by PEG (10000) adding, in the same time the particle size and the morphology were improved by the disperse effect of PEG(10000). And the luminescent intensity of CaSnO3:Eu3+ is enhanced slightly only by adding the PEG (10000).


Xiao L.-J.,Shenyang University of Chemical Technology | Xie Y.,Shenyang University of Chemical Technology | He M.-R.,Shenyang Supervision and Inspection Institute for Product Quality | Xin Y.,Shenyang University of Chemical Technology | And 3 more authors.
Journal of Nanoscience and Nanotechnology | Year: 2011

GdAl 3(BO 3) 4:Eu 3+ red phosphors were prepared using citric acid as complex agent by sol-gel technique. The preparation conditions of the precursor synthesis, including crystallization temperature and crystallization time were investigated. Their structure and luminescence properties were characterized by X-ray diffraction (XRD) analysis and fluorescence spectrometry. The results showed that GdAl 3(BO 3) 4:Eu 3+ phosphor crystallized at 960 °C for 2 h have been synthesized by sol-gel method. The phosphor is distributed into hexagonal system and the lattice parameters are a = 9.2992 nm c = 7.2577 nm. The excitation spectrum of Gd 0.95Al 3(BO 3) 4:Eu 3+0-05 samples is complex and the frequency scale is wide. It consists of a number of main excitation transitions namely 8S7/2 → 6I J (270 nm) of Gd 3+, and the others 7F 0→ 5L 6 (400 nm), 7F 0→ 5D 2 (472 nm) and 7F 0→ 5D 1 (542 nm) of Eu 3+. The main emission peaks are 614 nm and 619 nm, which are the characteristic emission peaks of Eu 3+. These emission peaks correspond to the transition from 5D 0 to 7F 2 of Eu 3+. The shape and the wavelength range of the emission spectrum are similar when the sample was excited by different excitation spectrum. Only the relative intensity of the emission peaks is different from each other. © 2011 American Scientific Publishers. All rights reserved.


Xie Y.,Shenyang University of Chemical Technology | Xiao L.-J.,Shenyang University of Chemical Technology | He M.-R.,Shenyang Supervision and Inspection Institute for Product Quality | Chen Y.-J.,Shenyang University of Chemical Technology | And 2 more authors.
Journal of Nanoscience and Nanotechnology | Year: 2011

BaAl 12O 19:Tb, Eu phosphors were prepared by sol-gel technique. The luminescence properties and the energy transfer between Eu 2+ and Tb 3+ were investigated. For BaAl 12O 19:Tb phosphor, the strongest excitation peak and emission peak produced from Tb 3+ transition of 5D 4- 7F 5 were at 240 nm and at 550 nm respectively, while the peak shape was narrow and peak intensity was large. The Eu 2+ added in the BaAl 12O 19:Tb induced energy transfer to Tb 3+ and different color luminescence from blue (400 nm) to green (570 nm) was obtained by changing the ratio of Tb 3+/Eu 2+ with excitation at 240 nm. © 2011 American Scientific Publishers. All rights reserved.


Xiao L.,Shenyang University of Chemical Technology | Xie Y.,Shenyang University of Chemical Technology | He M.,Shenyang Supervision and Inspection Institute for Product Quality | Chen Y.,Shenyang University of Chemical Technology | And 2 more authors.
Journal of Rare Earths | Year: 2010

BaAl12O19:Tb,Ce phosphors were prepared by sol-gel technique, the crystalline structures of samples characterized by XRD, and the luminescence properties and energy transfer between Ce3+ and Tb 3+ were investigated. The results indicated that the emission intensity and the excitation wavelength range of Tb3+ increased when Ce3+ was doped. It demonstrated that the Ce3+ added in the BaAl12O19:Tb could deliver energy to Tb3+, and Ce3+ was not luminous by itself. The relative emission intensity of Tb3+ at wavelength of 548 nm was the strongest by Tb 3+/Ce3+ ratio of 2:1, when excited at 310 nm, which was the characteristic adsorption wavelength of Ce3+. © 2010 The Chinese Society of Rare Earths.

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