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Luminescence studies of dysprosium doped strontium aluminate white light emitting phosphor by combustion route

  • Ishwar Prasad SahuEmail author
  • D. P. Bisen
  • Nameeta Brahme
  • Raunak Kumar Tamrakar
  • Ravi Shrivastava
Article

Abstract

In the present investigation dysprosium doped strontium aluminate phosphor was prepared by combustion synthesis method. The crystal structure of the prepared phosphor was consistent with standard monoclinic phase with a space group P21. According to the TEM analysis, the particle size was found to be in the nanometer range. The trap parameters which are mainly activation energy (E), frequency factor (s) and order of the kinetics (b) were evaluated by using the peak shape method. Under the ultraviolet (365 nm) excitation, photoluminescence (PL) spectra showed characteristic emission bands at 480 (blue), 573 (yellow) and 670 nm (red) due to 4F9/2 → 6H15/2, 4F9/2 → 6H13/2 and 4F9/2 → 6H11/2 transitions of Dy3+ ions. Combination of these three emissions constituted as white light confirmed by the Commission Internationale de L’Eclairage (CIE) chromatic coordinate diagram and possible mechanism of white light emitting SrAl2O4:Dy3+ phosphor was also investigated. The value of correlated color temperature (CCT) was found, well within the defined acceptable range (5965 K). The mechanoluminescence (ML) intensity of SrAl2O4:Dy3+ phosphor increases linearly with increasing impact velocity of the moving piston. Thus, the present investigation indicates the piezo-electricity was responsible to produce ML in prepared phosphor.

Keywords

Impact Velocity Dysprosium Glow Curve SrAl2O4 Thermally Stimulate Luminescence 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Ishwar Prasad Sahu
    • 1
    Email author
  • D. P. Bisen
    • 1
  • Nameeta Brahme
    • 1
  • Raunak Kumar Tamrakar
    • 2
  • Ravi Shrivastava
    • 3
  1. 1.School of Studies in Physics and AstrophysicsPt. Ravishankar Shukla UniversityRaipurIndia
  2. 2.Department of Applied PhysicsBhilai Institute of TechnologyDurgIndia
  3. 3.Department of PhysicsICFAI UniversityRaipurIndia

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