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Characterization and PL and TL properties of Ce3+ (en Inglés)
K. Dhanalakshmi
(Autor)
·
A. Jagannathareddy
(Autor)
·
R. Harikrishna
(Autor)
·
LAP Lambert Academic Publishing
· Tapa Blanda
Characterization and PL and TL properties of Ce3+ (en Inglés) - Dhanalakshmi, K. ; Jagannathareddy, A. ; Harikrishna, R.
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Reseña del libro "Characterization and PL and TL properties of Ce3+ (en Inglés)"
This book explains about Y2SiO5: Ce3+ (1-7 mol %) nanophosphors were prepared by solution combustion method using oxalyldihydrazide fuel. The phosphors were characterized by X-ray diffraction, scanning electron microscopy, UV-visible and Fourier transform infrared spectroscopy. The XRD patterns confirm the monoclinic structure of the prepared phosphors, with crystallite size of 66-74 nm. The surface morphology and elemental composition were evaluated by SEM and energy dispersive X-ray analysis. The optical band gap was calculated and is between4.66 eV - 4.9 eV. The presence of Si-O-Si and Y-O bonds was confirmed by the FTIR spectra. Effect of cerium concentration on photoluminescence and thermoluminescence intensity were interpreted. The photoluminescence emission spectrum was recorded under excitation wavelength of 370 nm, the emission spectra showed three significant peaks positioned at 418 nm, 459 nm and 485 nm, which are ascribed to electronic transitions between 5d-4f levels. The nature and activity of trap centers were evaluated from the parameters obtained from Chen′s peak shape method
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