SHI Induced Thermoluminescence Properties Of  sol-gel Derived Y2O3:Er3+ Nanophosphor

N.J. Shivaramu1, B.N. Lakshminarasappa1*, K.R. Nagabhushana2, Fouran Singh

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

DOI: 10.5185/amlett.2015.5713

Publication Date (Web): Mar 21, 2015

E-mail: bnlnarasappa@rediffmail.com

Abstract


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.

Keywords

Sol-gel synthesis, swift heavy ion, XRD, FE-SEM, thermoluminescence.

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