Synthesis of several enhanced ions doped yttrium&gadolinium oxide red phosphors by a polyethyleneglycol-assisted co-precipitation solution method

  • Yong Pu
  • Cong Zhao
  • Rong Jin
  • Xiaolong Jing
  • Hong Yu
Article
  • 19 Downloads

Abstract

The red-emitting (Y0.92−xyz,Gd x )2O3:Eu3+,yBi3+,zLi+ phosphors have been synthesized via a polyethyleneglycol (PEG)-assisted co-precipitation solution method. The X-ray diffraction (XRD) patterns showed that the obtained samples crystallized in a cubic crystal system with space group I a 3(206) (a = 1.0604 nm) and Eu3+, Gd3+, Bi3+,Li+ ions could be well doped into the substrate. It is shown in the scanning electron microscopy (SEM) images that the particles with approximately spherical or regular small block in morphology, the average crystallite size was calculated to be 300–500 nm and the PEG-assisted sample showed better dispersancy. The photoluminescence spectra and fluorescence decay curves indicated that the phosphors could be excited by 254 and 395 nm, the emission intensity and color purity could be improved with the doping of moderate Gd3+, Bi3+ and Li+ and the lifetime decreased a lot with the co-doping of Gd3+ and Bi3+, which may expand the application of the phosphors. The optimal addition concentrations of Gd3+, Bi3+, Li+ were 20, 2 and 5 mol%. Furthermore, the action mechanism of PEG and luminous property enhancement mechanism of Gd3+, Bi3+ and Li+ were discussed in the present work.

Notes

Acknowledgements

The authors thank the Chongqing Key Laboratory of Micro/Nano Materials Engineering and Technology. This work was supported by the Program of Chongqing Municipal Education Commission (KJ1501126), the National Natural Science Foundation of China (51702033) and the Foundation of Chongqing University of Arts and Sciences (Y2016XC51).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Yong Pu
    • 1
  • Cong Zhao
    • 1
  • Rong Jin
    • 1
  • Xiaolong Jing
    • 1
  • Hong Yu
    • 1
  1. 1.Research Institute for New Materials TechnologyChongqing University of Arts and SciencesChongqingChina

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