Journal of Electronic Materials

, Volume 48, Issue 1, pp 238–243 | Cite as

Annealing Effect on the Structural, Optical and EPR Properties of UV Radiation Emitting Gd3+ Doped SrAl2O4 Host

  • Vijay SinghEmail author
  • N. Singh
  • M. S. Pathak
  • V. Natarajan


An ultraviolet B (UVB) radiation emitting Gd3+ doped SrAl2O4 sample was synthesized by solution combustion. Powder x-ray diffraction, photoluminescence and electron paramagnetic resonance (EPR) techniques were used to characterize the as-prepared and annealed samples. The monoclinic phase of SrAl2O4 was identified. It was observed that by employing thermal annealing, the photoluminescence properties of Gd3+ doped SrAl2O4 sample could be considerably improved. The photoluminescence studies disclosed that the sample emits UVB radiation caused by the 6P5/2 → 8S7/2 and 6P7/2 → 8S7/2 transitions of the Gd3+ ions under 273 nm excitation. EPR studies revealed the presence of Gd3+ in the low symmetry Sr2+ sites in as prepared samples, while in annealed samples the intensity of the signal reduced drastically.


Combustion EPR Gd3+ SrAl2O4 luminescence 


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This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (2018M2B2A9065656).


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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  • Vijay Singh
    • 1
    Email author
  • N. Singh
    • 1
  • M. S. Pathak
    • 1
  • V. Natarajan
    • 2
  1. 1.Department of Chemical EngineeringKonkuk UniversitySeoulKorea
  2. 2.Institute of Advanced ResearchGandhinagarIndia

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