Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Afterglow Effect from Adding BaF2 to Oxyfluoride Glass Ceramic Containing Eu2+-doped Nepheline

  • Lee, Hansol (Institute for Rare Metals and Division of Advanced Material Engineering, Kongju National University) ;
  • Chung, Woon Jin (Institute for Rare Metals and Division of Advanced Material Engineering, Kongju National University)
  • Received : 2022.02.16
  • Accepted : 2022.06.04
  • Published : 2022.08.25
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Abstract

An oxyfluoride glass ceramic containing Eu2+-doped nepheline and LaF3 crystals was modified, with BaF2 replacing LaF3 up to 20 mole percent, and its luminescence change was monitored. With increasing BaF2 content, the greenish yellow emission centered at 540 nm under 400-nm excitation decreased, and a new afterglow emission from the modified ceramic was observed after removal of the excitation light source. X-ray diffraction (XRD) and transmission electron microscopy with energy dispersive spectroscopy (TEM-EDS) were used to investigate the changes in the crystalline phases within the glass matrix. Time dependent emission intensity was monitored to observe the afterglow, and the possible mechanism for the afterglow due to BaF2 addition was considered.

Keywords

Acknowledgement

National Research Foundation of Korea (NRF) grant; Korean government (MIST) (No. NRF-2019R1A2C1007621).

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