|About this Abstract
||Materials Science & Technology 2020
||Ceramic and Crystal Materials for Optics and Photonics
||Self Activated Ca3Si2O7 + Ca2SiO4:Dy3+ Phosphors Derived from Agro-food Wastes
||Manmeet Kaur, Kulvir Singh
|On-Site Speaker (Planned)
A cost-effective route is presented to synthesize Dy3+ doped mixed phase Ca3Si2O7 + Ca2SiO4 phosphors using agro-food wastes (rice husk ash and egg shell powder). These phosphors (Ca3-xSi2O7 : xDy3+, x=0, 0.0025, 0.0050, 0.0075, 0.0100) have been synthesized using solid-state reaction method. X-ray diffraction confirms that Dy3+ doping increases the volume fraction of Ca2SiO4 phase in comparison to the Ca3Si2O7 phase, till x=0.0050. Scanning electron microscope images indicate that liquid phase sintering is taking place in all the samples. The photoluminescence spectrum contains additional bands due to the inherently present titanium ions (as confirmed by energy dispersive x-ray spectroscopy), along with the typical emission bands of Dy3+. The optical band gap calculated using diffuse reflectance spectra lies in the 3.67-3.79 eV range. CIE co-ordinates lie in the white light region suggesting that these phosphors could potentially find use in solid-state lighting application.