Intense violet–blue emission and paramagnetism of nanocrystalline Gd3+ doped ZnO ceramics

S. Sambasivam, D. Paul Joseph, S. Asiri Naidu, K. N. Hui, K. S. Hui, B. C. Choi

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Abstract

Nanocrystalline Zn1-xGdxO (x = 0, 0.02, 0.04, 0.06, and 0.08) ceramics were synthesized by ball milling and subsequent solid-state reaction. The transmission electron microscopy (TEM) micrograph of as synthesized samples revealed the formation of crystallites with an average diameter of 60 nm, and the selected area electron diffraction (SAED) pattern confirmed the formation of wurtzite structure. A red shift in the band gap was observed with increasing Gd3+ concentration. The photoluminescence of nanocrystalline Gd3+ doped ZnO exhibited a strong violet–blue emission. Concentration dependence of the emission intensity of Gd3+ in ZnO was studied, and the critical concentration was found to be 4 mol% of Gd3+. The Gd3+ doped ZnO exhibited paramagnetic behavior at room temperature, and the magnetic moment increased with Gd3+ concentration.

Original languageEnglish
Pages (from-to)300-306
Number of pages7
JournalJournal of Advanced Ceramics
Volume4
Issue number4
Early online date24 Nov 2015
DOIs
Publication statusPublished - Dec 2015

Keywords

  • nano-ceramics
  • rare earth element
  • semiconductors
  • X-ray diffraction (XRD)

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