Journal of Materials Science: Materials in Electronics

, Volume 26, Issue 9, pp 7059–7072 | Cite as

The role of europium and dysprosium in the bluish-green long lasting Sr2Al2SiO7:Eu2+, Dy3+ phosphor by solid state reaction method

  • Ishwar Prasad Sahu


The Sr2Al2SiO7; Sr2Al2SiO7:Eu2+; Sr2Al2SiO7:Dy3+ and Sr2Al2SiO7:Eu2+, Dy3+ phosphors were synthesized by the traditional high temperature solid state reaction method. The synthesized phosphors were characterized by powder X-ray diffraction, energy dispersive X-ray spectroscopy, thermoluminescence (TL), photoluminescence (PL) long afterglow and mechanoluminescence (ML) techniques. The crystal structures of sintered phosphors were gehlenite type structure which belongs to the tetragonal crystallography. The TL properties of these phosphors were investigated and results were also compared. Under the ultraviolet excitation, the emission spectra of Sr2Al2SiO7:Eu2+ and Sr2Al2SiO7:Eu2+, Dy3+ phosphors were composed of a broad band peaking at 490 nm (bluish-green), belonging to the broad emission band and Sr2Al2SiO7:Dy3+ phosphor emits the white light, which was confirmed from the calculated CIE coordinates. When the Sr2Al2SiO7:Eu2+ phosphor is co-doped with Dy3+, the intensity of TL, PL, afterglow and ML is strongly enhanced. Decay graph indicate that both the sintered phosphors contains fast decay and slow decay process. The ML intensities of Sr2Al2SiO7:Dy3+; Sr2Al2SiO7:Eu2+ and Sr2Al2SiO7:Eu2+, Dy3+ phosphors were proportionally increased with the increasing impact velocity of the moving piston, which suggests that these phosphor can be used as sensors to detect the stress of an object.


Glow Curve Thermally Stimulate Luminescence Trap Depth Glow Peak White Light Emission 
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.



We are very much grateful to UGC-DAE Consortium for Scientific Research, Indore (M.P.) for the XRD Characterization and we are also very much thankful to Dr. Mukul Gupta for his co-operation.


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.School of Studies in Physics and AstrophysicsPt. Ravishankar Shukla UniversityRaipurIndia

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