Abstract
Behaviour displayed by mechanoluminescence (ML) in CaZrO3:Eu3+ doped phosphors with variable concentration of europium ions are described. When the ML is excited impulsively by the impact of a load on the phosphors the ML intensity increases with time, attains a maximum value and then it decreases. In the ML intensity versus time curve, the peak increases and shifts towards shorter time values with increasing impact velocities. Sample was synthesized by combustion synthesis method with variable concentration of Eu3+ ions (0.1, 0.2, 0.5, 1, 1.5 mol%) and characterized by X-ray diffraction technique. The total ML intensity IT is defined as the area below the ML intensity versus time curve. Initially IT increases with impact velocity V0 of the load and then it attains a saturation value for higher values of impact velocities which follow the relation IT = IT 0 exp.(−Vc/V0) where IT 0 and Vc are constants. Total ML intensity increases linearly with the mass of the phosphors for higher impact velocities. The ML intensity Im, corresponding to the peak of ML intensity versus time curve increases linearly with the impact velocities. The time tm, is found to be linearly related to 1000/V0. The mechanoluminescence induced by impulsive excitation in europium doped CaZrO3 phosphors plays a significance role in the understanding of biological sensors and display device application.
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Tiwari, N., Dubey, V. & Kuraria, R.K. Mechanoluminescence Study of Europium Doped CaZrO3 Phosphor. J Fluoresc 26, 1309–1315 (2016). https://doi.org/10.1007/s10895-016-1817-0
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DOI: https://doi.org/10.1007/s10895-016-1817-0