Structural and luminescent studies of erbium‐doped CaZrO3 green‐emitting nanophosphors |
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| Authors: | Evangeline Ballem Abdul Azeem Prasada Rao Rayavarapu Haranath Divi |
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| Institution: | 1. Department of Physics, National Institute of Technology, Warangal, India;2. Department of Materials Science and Engineering, National University of Singapore, Singapore;3. CSIR – National Physical Laboratory, New Delhi, India |
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| Abstract: | Erbium (Er) (0.5, 1.0 and 1.5 wt%)‐doped CaZrO3 nanophosphors were synthesized by the sol–gel method using poly(vinyl alcohol) as the chelating agent. Their structural and photoluminescence properties were studied using X‐ray diffraction (XRD), field emission scanning electron microscopy–energy dispersive spectroscopy (FESEM‐EDS), transmission electron microscopy (TEM), photoluminescence and Fourier transform infrared spectroscopy (FTIR). The XRD patterns of the samples confirm that nanoscale crystallite sizes. Agglomeration of the samples was observed using field emission scanning electron microscopy images. Energy dispersive spectroscopy measurements confirmed the existence of Ca, Zr, O and Er in the samples. Average particle sizes for the samples were calculated from transmission electron microscopy images. FTIR spectra clearly show characteristic absorption bands related to the metal oxides, as well as some other organic molecules. The photoluminescence spectra show bands in the green region. The Commission International de l'Eclairage coordinates were calculated and found to be in green region. |
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| Keywords: | luminescence nanophosphors TEM XRD |
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