A New Promising Silicate-Based Phosphor for Red Light and White Light Emitting Devices

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

JOURNAL OF FLUORESCENCE, vol.35, pp.9029-9036, 2025 (SCI-Expanded, Scopus)

  • Publication Type: Article / Article
  • Volume: 35
  • Publication Date: 2025
  • Doi Number: 10.1007/s10895-025-04219-9
  • Journal Name: JOURNAL OF FLUORESCENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Biotechnology Research Abstracts, Chimica, Compendex, MEDLINE
  • Page Numbers: pp.9029-9036
  • Open Archive Collection: AVESIS Open Access Collection
  • Hacettepe University Affiliated: Yes

Abstract

The aim of this study is to investigate the structure, particle morphology, photoluminescence, and chemical composition of materials for application in light-emitting devices. The present work primarily focuses on the synthesis and characterization of Ba3CdSi2O8:RE (RE: Ce3+, Eu3+, and Dy3+) phosphors via the solid-state reaction method. XRD and FT-IR techniques were used to characterize the phosphors. The XRD patterns of the phosphors reveal that the peaks match those of the Ba3Cd(SiO4)2 host material (PDF Card number: 00-028-0128), with no impurity peaks observed. The photoluminescence (PL) emission spectra of Ba3CdSi2O8:RE (RE: Ce3+, Eu3+, and Dy3+) phosphors were investigated in detail. Ba3CdSi2O8: Dy3+ phosphors show four emission bands in the blue (450-510 nm), yellow (550-600 nm), red (640-700 nm), and deep red (740-770 nm) regions. Ce3+-doped Ba(3)CdSi(2)O(8 )phosphors show a broad emission band from 575 nm to 700 nm, with a maximum around 594 nm, which is assigned to the 5d-4f transition of Ce3+ ions. Moreover, Ba3CdSi2O8 : Eu3+ phosphors capture excitation energy through charge transfer transitions of Eu3+ ions and emit at 586 nm, 613 nm, 653 nm, and 700 nm, corresponding to the 5D(0) -> 7 F-0, 5D(0)-> 7 F-2, 5D(0)-> 7 F-3, and 5D(0)-> 7 F4 transitions of Eu3+ ions, respectively. The CIE color coordinates confirm that Eu3+ doping shifts the color toward red, while Dy3+ and Ce3+ doping result in shifts within other parts of the chromaticity space.