4.5 Article

Synthesis and luminescence properties of YVO4:Eu3+ cobblestone - like microcrystalline phosphors obtained from the mixed solvent - thermal method

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ELSEVIER
DOI: 10.1016/j.mseb.2010.09.005

关键词

Vanadate; Luminescence; Mixed solvent - thermal method; Europium; Microcrystalline

资金

  1. National Basic Research Program of China [2010CB732300]
  2. International Science and Technology Cooperation Program of China [2006DFA42740]
  3. National Natural Science Foundation of China [20601008]
  4. Education Committee of Shanghai [J51503]

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The mixed solvent-thermal method has been developed for the synthesis of YVO4:Eu3+ luminescent materials in the N, N-dimethylformamide (DMF)/ de-ionized water (DIW) solution. The samples have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electronic microscope (TEM), UV/vis absorption and photoluminescence spectroscopies. The results demonstrate that we have obtained the uniform YVO4:Eu3+ cobblestone - like microcrystalline phosphors in the mixed solution of DMF and DIW, which are different to the as-obtained YVO4:Eu3+ nanoparticles in pure DIW. And the as - prepared YVO4:Eu3+ microcrystalline particles are composed of numerous nanoparticles. The assembling phenomenon of the nanoparticles is strongly affected by the pH value of the solution and the volume ratio of DMF/DIW. Under UV excitation, the samples can emit the bright red light. While, the photoluminescence (PL) intensities of YVO4:Eu3+ show some difference for samples obtained under the different reaction conditions. This is because that different microstructures of samples result in different combinative abilities between the surface and the adsorbed species so as to produce the different quenching abilities to the emission from Eu3+ ions. (C) 2010 Elsevier B.V. All rights reserved.

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