Phase transition and optical properties of Ba1-xZnxAl2O4:0.1% Eu3+ prepared via citrate sol-gel method

V. M. Maphiri*, J. Wesley-Smith, S. V. Motloung

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Undoped and Ba1-xZnxAl2O4:0.1% Eu3+ series (0 ≤ x ≤ 1) were successfully prepared using the citrate sol-gel method. X-ray diffraction (XRD) results revealed that depending on the Zn moles, the prepared samples could be indexed to hexagonal BaAl2O4 and cubic ZnAl2O4 structures. Scanning electron microscopy (SEM) shows that varying Zn moles changes the morphology of the prepared sample. Transmission electron microscopy (TEM) results confirmed the nano-crystallite shape and size of the structures seen in SEM, and the multiphase nature predicted by XRD. The photoluminescence (PL) results showed distinct emission peaks, which were either attributed to the host intrinsic intra-band gap defects or to characteristic transitions within Eu3+ ions. The International Commission on Illumination (CIE) colour coordinates showed that the emission colour can be tuned when varying the Zn mole.

Original languageEnglish
Article number116710
JournalJournal of Luminescence
Volume215
DOIs
Publication statusPublished - Nov 2019

Keywords

  • Eu-doped
  • Luminescence
  • Multiphase
  • Zn mole

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