Synthesis and Luminescence Property of ${\hbox{Gd}}_{2}{\hbox{SiO}}_{5}$ Phosphor

This paper reports the synthesis of Gd
₂
SiO
₅
phosphor by a modified solid-state reaction method. The sample was characterized by the X-ray diffraction (XRD) technique, and the XRD spectrum matched with JCPDS card specifically appeared for Gd
₂
SiO
₅
. This is a confirmation of proper preparation of the sample. Photoluminescence (PL) study of the sample was done. PL excitation spectra was found at 242, 275, 312 nm while the emission spectra was found at 380, 416, 439, 489, 545, 589, 607, 617, and 630 nm. The Commission Internationale de l'Eclairage (CIE) co-ordinate of this phosphor is x = 0.294, y = 0.222, in the purplish white color touches white line boundary. Thermoluminescence (TL) glow curves were recorded for different doses of γ- ray exposure at a heating rate of 6.7° C·s
^-1
. The kinetic parameters of Gd
₂
SiO
₅
have been calculated by using peak shape method. Sample shows general order kinetics for most of the peaks. Also, the TL glow curves of the sample were measured at various delay times. With increased delay time, the intensity of the TL peak decays and the position of the peak shifts toward a higher temperature, indicating the considerable re-trapping associated with general order kinetics. The present phosphor can act as a host for purplish white color emission (touches white line) for display devices and light emitting diode (LED), as well as may be used for thermoluminescence dosimetric material under γ dose.