Studies on the luminescence behavior of SrCaMgSi2O7:Eu3+ phosphor by solid state reaction method

Abstract

A new orange–red europium doped strontium calcium magnesium di-silicate (SrCaMgSi2O7:Eu3+) phosphor was prepared by the traditional high temperature solid state reaction method. The tetragonal structure of the orange–red compound was confirmed by the X-ray diffraction (XRD) technique. An energy dispersive X-ray spectroscopy (EDS) confirms the presence of elements in sintered phosphor. The thermoluminescence (TL) kinetic parameters such as activation energy, order of kinetics and frequency factor was calculated by peak shape method. In this work, the orange–red emission originated from the 5D0–7FJ (J = 0, 1, 2, 3, 4) transitions of Eu3+ ions could clearly be observed after sample was excited at 396 nm. Commission International de I’Eclairage color chromaticity diagram, TL spectra and ML spectra confirms the prepare SrCaMgSi2O7:Eu3+ phosphor exhibits orange–red emission. The mechanoluminescence (ML) intensity of SrCaMgSi2O7:Eu3+ phosphor increases linearly with increasing impact velocity of the moving piston which suggests that this phosphor can be used as sensors to detect the stress of an object. Thus, the present investigation indicates the piezo-electricity was responsible to produce ML in prepared SrCaMgSi2O7:Eu3+ phosphor.