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SUMMARY:Effect of Eu3+ concentration on the BaAl2O4/CaAl4O7:x% Eu3+ (0 ≤
  x ≤ 5.5) mixed phases nanophosphors synthesized using citrate sol-gel m
 ethod.
DTSTART;VALUE=DATE-TIME:20210726T104500Z
DTEND;VALUE=DATE-TIME:20210726T110000Z
DTSTAMP;VALUE=DATE-TIME:20260713T184030Z
UID:indico-contribution-7098@events.saip.org.za
DESCRIPTION:Speakers: Bamba Mahman (SMU)\nA series of undoped mixed phase 
 BaAl2O4/CaAl4O7 (hereafter called BC) and doped BC:x% Eu3+ (0 < x ≤ 5.5)
  mixed phases nanophosphors were successfully prepared by the citrate sol-
 gel technique. The structure\, morphology and optical properties of the na
 nophosphors were studied in details by the X-ray diffraction (XRD)\, Scann
 ing electron microscopy (SEM)\, Transmission electron microscopy (TEM) and
  Photoluminescence (PL) spectroscopy. XRD and SEM showed that all the BC:x
 % Eu3+ samples consists of the crystalline structure of the mixed phases o
 f both the BaAl2O4 and CaAl4O7 materials. The structure resembles more of 
 the BaAl2O4 than the CaAl4O7 phase. The TEM results suggest that crystalli
 te sizes are in the nanometer scale with rods-like particles. PL results s
 howed multiple emission peaks located at 436\, 590\, 616\, 656 and 703 nm\
 , which were assigned to the intrinsic defects within the BC matrix\, 5D0 
 → 7F1\, 5D0 → 7F2\, 5D0 → 7F3 and 5D0 → 7F4 transitions of Eu3+\, 
 respectively. The decay curves evidently showed that the nanophosphors hav
 e persistent luminescence. The Commission International de l’Eclairage (
 CIE) analysis revealed that BC emits a blue colour while the Eu3+-doped BC
  phosphors emit in the orange-red region. The results indicate that the Eu
 3+-doped samples can potentially be used in the orange/red-emitting phosph
 ors.\n\nhttps://events.saip.org.za/event/206/contributions/7098/
LOCATION:North-West University Potchefstroom Campus
URL:https://events.saip.org.za/event/206/contributions/7098/
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