Effect of annealing on down‐conversion properties of monoclinic Gd2O3:Er3+ nanophosphors |
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| Authors: | Raunak Kumar Tamrakar D P Bisen Kanchan Upadhyay |
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| Institution: | 1. Department of Applied Physics, Bhilai Institute of Technology (Seth Balkrishan Memorial), Durg (C.G.), India;2. School of Studies in Physics and Astrophysics, Pt. Ravishankar Shukla University, Raipur (C.G.), India;3. Department of Chemistry, Shri Shankaracharya Vidyalaya, Bhilai (C.G.), India |
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| Abstract: | Erbium‐doped nano‐sized Gd2O3 phosphor was prepared by a solution combustion method in the presence of urea as a fuel. The phosphor was characterized by X‐ray diffractometry (XRD), Fourier transform infra‐red spectroscopy, energy dispersive X‐ray analysis (EDX) and transmission electron microscopy (TEM). The results of the XRD shows that the phosphor has a monoclinic phase, which was further confirmed by the TEM results. Particle size was calculated by the Debye–Scherrer formula. The erbium‐doped Gd2O3 nanophosphor was revealed to have good down‐conversion (DC) properties and the intensity of phosphor could be modified by annealing. The effects of annealing at 900°C on the particle size and luminescence properties were studied and compared with freshly prepared Gd2O3:Er3+ nanoparticles. The average particle sizes were calculated as 8 and 20 nm for the freshly prepared samples and samples annealed at 900°C for 1 h, respectively. The results show that both freshly prepared and annealed Gd2O3:Er3+ have monoclinic structure. Copyright © 2014 John Wiley & Sons, Ltd. |
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| Keywords: | Gd2O3:Er3+ phosphor annealing XRD SEM TEM EDX photo‐luminescence |
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