Impulsive excitation of mechanoluminescence in europium activated strontium ortho-silicate phosphor

• Published in: Journal of materials science. Materials in electronics Vol. 27; no. 4; pp. 3934 - 3940
• Main Authors: Sahu, Ishwar Prasad, Bisen, D. P., Brahme, N.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-04-2016; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Europium; Impact velocity; Materials Science; Mechanoluminescence; Optical and Electronic Materials; Phosphors; Pistons; Sintering; Strontium; Glow Curve; Impact Velocity; SrAl2O4; Trap Depth; Field Emission Scanning Electron Microscopy
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-015-4245-z

Europium doped strontium ortho-silicate (Sr
2
SiO
4
:Eu
2+
) phosphor was prepared by the traditional high temperature solid state reaction method. The crystal structure of sintered phosphor was consistent with the orthorhombic crystallography with space group Pmna. The surface of the prepared phosphor was not found to be uniform and particle distribution in different size. An energy dispersive X-ray spectroscopy (EDS) spectrum confirms the presence of elements in sintered phosphor. The mechanoluminescence (ML) intensity of Sr
2
SiO
4
:Eu
2+
phosphor increases linearly with increasing impact velocity of the moving piston which suggests that these phosphors can be used as sensors to detect the stress of an object. Thus, the present investigation indicates the piezo-electricity is responsible to produce ML in prepared Sr
2
SiO
4
:Eu
2+
phosphor. The time of the peak ML intensity and the decay rate did not change significantly with respect to increasing impact velocity of the moving piston and peak ML intensity increases linearly.