Abstract
An environment friendly and cost-effective method is presented to utilize natural resources to synthesize Ca3−xSi2O7:xDy3+,x(%)=0.00, 0.25, 0.50, 0.75, 1.00 cool white light emitting diodes by solid-state synthesis technique. The structural, morphological and luminescent properties of the synthesized phosphors have been studied using various experimental techniques. X-ray diffraction confirms that doping of dysprosium (Dy3+) enhances the volume fraction of Ca2SiO4 phase with respect to Ca3Si2O7 phase, upto x(%)=0.50. As indicated by the scanning electron microscope images all samples show partial liquid phase sintering. Fourier transform infrared spectroscopy shows the presence of bands corresponding to the vibrational modes of Si–O and O–Si–O units present in Ca3Si2O7 and Ca2SiO4 phase. Diffuse reflectance spectra results produce optical band gap values between 3.67- 3.79 eV. Along with the characteristic emission bands of Dy3+, the photoluminescence spectra contains additional bands due to trace titanium ions naturally found in the agriculture and food wastes. Commission International de’Eclairage coordinates (CIE) coordinates are in the white region of the CIE diagram, suggesting that this is an effective method of utilizing agriculture and food wastes for synthesizing cool white light emitting diodes.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.