Photoluminescence and Thermoluminescence Studies of Beta-Irradiated Ba<sub>3</sub>CdSi<sub>2</sub>O<sub>8</sub>:Tb<SUP>3+</SUP> Phosphor for LED and Dosimetry Applications

Basaran B. Y., KAFADAR V. E., EMEN F. M., Oeztuerk E., Karacolak A. I.

LUMINESCENCE, no.4, 2025 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Publication Date: 2025
  • Doi Number: 10.1002/bio.70171
  • Journal Name: LUMINESCENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Analytical Abstracts, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Communication Abstracts, INSPEC, MEDLINE, Metadex, Veterinary Science Database, Civil Engineering Abstracts
  • Hacettepe University Affiliated: Yes

Abstract

The present work reports the preparation, characterization, and photoluminescence (PL) and thermoluminescence (TL) responses of Tb3+-doped Ba3CdSi2O8 phosphors. X-ray diffraction analysis confirmed the consistency of the Tb3+-doped Ba3CdSi2O8 samples with the PDF 00-028-0128 card structure. The TL glow curve of the material was examined at different dopant concentrations after irradiation with a Sr-90/Y-90 beta source. Among the samples, Ba3CdSi2O8: 5% Tb3+ exhibited the highest TL intensity compared with the other concentrations. The glow curve deconvolution method was used to determine the number of peaks, trap structure, and kinetic parameters within the TL glow curve, yielding a figure of merit (FOM) value of 1.11. The PL spectra show that the 2.0%, 3.0%, 4.0%, 5.0%, and 6.0% mole Tb3+-doped Ba3Cd (SiO4)(2) phosphors capture excitation energy through the 4f-5d transitions of Tb3+ ions and emit light at 417, 440, 492, 552, 589, and 628 nm, corresponding to the 5D(3)-7F(5), 5D(3)-7F(4), 5D(4)-7F(6), 5D(4)-7F(5), 5D(4)-7F(4), and 5D(4)-7F(3) transitions, respectively.