SHI induced thermoluminescence properties of sol-gel derived Y2O3:Er3+ nanophosphor
1Department of Physics, Jnanabharathi Campus, Bangalore University, Bangalore 560 056, India
2Department of Physics (S & H), PES University, 100 feet Ring Rd., BSK 3rd Stage, Bangalore 560 085, India
3Inter University Accelerator Centre, P.O. Box No. 10502, New Delhi 110 067, India
Adv. Mater. Lett., 2015, 6 (4), pp 342-347
Publication Date (Web): Mar 21, 2015
Copyright © IAAM-VBRI Press
Nanocrystalline erbium doped yttrium oxide (Y2O3:Er3+) was synthesized by the sol-gel technique using citric acid as complexing agent. The synthesized samples were characterized by X-ray diffraction (XRD), Field emission scanning electron microscope (FE-SEM) techniques for phase-purity and microstructure. Er3+ doped Y2O3 crystallizes in cubic phase with an average crystallite size of 24.3 nm. The pellets of Y2O3:Er3+ were irradiated with 100 MeV swift Si8+ ions with fluence in the range of 3×1011 - 3×1013 ions cm-2. Three well resolved thermoluminescence (TL) glows with peaks at ~422, 525 and 620 K were observed in Er3+ doped Y2O3 samples. It was observed that the TL intensity was found to increases with increasing Er3+ concentration up to 0.4 mol% in Y2O3 and thereafter it decreases with further increase of Er3+ concentration. Also, the intensity of low temperature TL glow peak (~422 K) increases with increasing ion fluence up to 1×1012 ions cm-2 and decreases with further increase of ion fluences. The TL trap parameters were calculated by glow curve shape method and the deconvoluted glows were exhibit of second order kinetics.
Sol-gel synthesis, swift heavy ion, XRD, FE-SEM, thermoluminescence.