Synthesis and luminescent properties of nanosized YVO4:Ln (Ln=Sm, Dy)

Zhang, Hongwu; Fu, Xin; Niu, Shuyun; Xin, Qin

doi:10.1016/j.jallcom.2007.02.134

Cited by 100 publications

(49 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The stretching frequency of the M-O band is found below 600 cm -1 for all synthesized samples. The peaks observed at 1376 and 1637 cm -1 in samples prepared through combustion correspond to the C-O band and O-H-O bending vibrations [26][27][28][29]. The C-O and O-H-O vibrations or more precisely OH -ions on the surface of particles act as a source of quencher to luminescence intensity and the luminescence intensity can be effectively increased after removing OHions via high-temperature heat treatment.…”

Section: Resultsmentioning

confidence: 99%

Structural and photoluminescence properties of red-light emitting YVO4:Eu3+ phosphor synthesized by combustion and solid-state reaction techniques: a comparative study

2015

View full text Add to dashboard Cite

In this work, Eu 3? -doped YVO 4 phosphors were prepared via the solid-state reaction and the combustion method and the role of the synthesis process on the structural and emission properties of YVO 4 :Eu 3? was investigated. Combustion synthesis yielded tetragonal phase with the space group I4 1 /amd at a relatively low temperature and within short duration. The infrared spectra confirmed the characteristic bands of Y-O and V-O at around 450 and 830 cm -1 , while the samples prepared by combustion route exhibited C-O band and O-H-O bending vibrations at 1376 and 1637 cm -1 , respectively. The band gap energy of YVO 4 , prepared by different methods, was found in the range of 3.6-3.73 eV. Upon UV excitation, the Eu 3? -activated samples exhibited characteristic red-orange emission lines generated from 5 D 0 ? 7 F 1,2 transitions of Eu 3? ions, respectively. The red-to-orange emission intensity ratio was found to be around 4.6 for all samples and proved to be competitive with the commercially available red phosphors. However, Y 1-x Eu x VO 4 phosphors, synthesized by solid-state reaction technique, exhibited elevated Eu 3? solubility and higher emission intensity than the samples prepared by combustion route owing to the larger crystallite size and minor C-O and O-H bonds. The critical concentration of Eu 3? ions for the maximum emission was estimated to be 2.0 and 0.5 mol% for the samples obtained by solid-state reaction and combustion method, respectively. The present phosphors were observed to be effectively excitable via the broad range of UV lights and were proved to be compatible with the UV LEDs.

show abstract

Section: Resultsmentioning

confidence: 99%

Structural and photoluminescence properties of red-light emitting YVO4:Eu3+ phosphor synthesized by combustion and solid-state reaction techniques: a comparative study

2015

View full text Add to dashboard Cite

show abstract

“…Its proton conductivity at elevated temperatures makes it a candidate material for electrochemical devices [3]. To the best of our knowledge, however, few researches have been done concerning the photoluminescence of SrZrO 3 [4].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and luminescence of Eu3+-doped SrZrO3 nanocrystals

Zhang¹,

Lü²,

Zhou³

et al. 2009

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…The peaks related to yttrium and vanadium oxide are not observed, which is an indication that the precursors reacted completely. In the literature there are numerous works reporting on different methodologies for the preparation of the YVO 4 matrix [20,28], but the temperature employed in these procedures is always higher than the one used in the present work. Indeed, with the technique utilized herein formation of the YVO 4 phases was found to begin at 100°C for the S1C samples (Fig.…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 97%

“…The Pechini process has been employed by Yee-Shin Chang et al in the preparation of the YVO 4 matrix at a temperature of 800°C [27]. In the conventional synthetic process, YVO 4 has been prepared by the solid-state process at a temperature above 1,000°C [28].…”

Section: Introductionmentioning

confidence: 99%

Influence of Catalyses on the Preparation of YVO4:Eu3+ Phosphors by the Sol–gel Methodology

et al. 2011

View full text Add to dashboard Cite

YVO(4):Eu(3+) phosphors have been prepared by the hydrolytic sol-gel methodology, with and without alkaline catalyst. The solid powder was obtained by reaction between yttrium III chloride and vanadium alkoxides; the europium III chloride was used as structural probe. The powder was treated at 100, 400, 600, or 800 °C for 4 h. The samples were characterized by X-ray diffraction, thermal analysis, and photoluminescence. The XRD patterns revealed YVO(4) crystalline phase formation for the sample prepared without the catalyst and heat-treated at 600 °C and for the sample prepared in the presence of ammonium as catalyst and heat-treated at 100 °C. The average nanosized crystallites were estimated by the Scherrer equation. The sample which was produced via alkaline catalysis underwent weight loss in two stages, at 100 and 400 °C, whereas the sample obtained without catalyst presented four stages of weight loss, at 150, 250, 400, and 650 °C. The excitation spectra of the samples treated at different temperatures displayed the charge transfer band (CTB) at 320 nm. PL data of all the samples revealed the characteristic transition bands arising from the (5)D(0) → (5)F(J) (J = 0, 1, 2, 3, and 4) manifolds under maximum excitation at 320, 394, and 466 nm in all cases. The (5)D(0) → (7)F(2) transition often dominates the emission spectra, indicating that the Eu(3+) ion occupies a site without inversion center. The long lifetime suggests that the matrix can be applied as phosphors. In conclusion, the sol-gel methodology is a very efficient approach for the production of phosphors at low temperature.

show abstract

Synthesis and luminescent properties of nanosized YVO4:Ln (Ln=Sm, Dy)

Cited by 100 publications

References 17 publications

Structural and photoluminescence properties of red-light emitting YVO4:Eu3+ phosphor synthesized by combustion and solid-state reaction techniques: a comparative study

Structural and photoluminescence properties of red-light emitting YVO4:Eu3+ phosphor synthesized by combustion and solid-state reaction techniques: a comparative study

Synthesis, characterization and luminescence of Eu3+-doped SrZrO3 nanocrystals

Influence of Catalyses on the Preparation of YVO4:Eu3+ Phosphors by the Sol–gel Methodology

Contact Info

Product

Resources

About