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|YAG:ag nanophosphors – synthesis and characterization
|Sundari, S. Shanmuga
|Yttrium aluminium garnet
|University of Aveiro
|Yttrium Aluminium Garnet (Y3Al5O12)-YAG and Ag of four different mol% in YAG (0.5, 1.0, 1.5 and 2.0 mol % of Ag) – YAG:Ag were synthesized by Pechini method. The synthesized pure YAG was white in colour but the incorporation of Ag in the YAG matrix forms colour centre and turns to pink. The intensity of pink Ag doped YAG is increasing with the increase in mol% of Ag. In the present work the synthesis and the preliminary characteristics about the structure, morphology, elemental composition and optical properties were studied using XRD, FTIR, SEM – EDAX, UV-Vis and PL spectroscopy. The sharp peak in the XRD reveals the good crystalline nature of the samples. The bending and stretching vibrations of the oxygen groups associated with YAG was observed in FTIR spectra. Tube like morphology was noticed in the SEM and increase in crystallite size is also perceived in YAG:Ag. The elemental mapping by EDAX confirmed the purity of synthesised samples. UV spectra shows the absorption peaks due to Ag incorporated in the YAG matrix. The PL spectra reveals the blue and green light emitting properties of the synthesized YAG nanophosphors.
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