Tunable spectroscopic properties of benitoite BaTiSi2GeO9:Eu3+ phosphors

• Published in: Materials research bulletin Vol. 180; p. 113035
• Main Authors: Lemański, K., Babij, M.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2024
• Subjects: Benitoite; Europium ions; Germanosilicate compounds; Polycrystals; Spectroscopy; Polycrystals; Spectroscopy; Germanosilicate compounds; Benitoite; Europium ions
• ISSN: 0025-5408
• DOI: 10.1016/j.materresbull.2024.113035

•BaTiSi2GeO9 silicate polycrystals doped with Eu3+ ions were successfully synthesized.•Benitoite structure were stabilize without using high pressure during the synthesis.•Refractive index and energy bandgap of the samples were estimated.•Temperature measurements confirmed the high thermal stability of the polycrystals.•Luminescence of the obtained samples can be easily tuned. The BaTiSi2GeO9 (BTSGO) germanium stabilized benitoite polycrystals doped with Eu3+ ions were synthesized with using the solid-state reaction method. The crystal structure of the obtained silicates was confirmed using powder diffractometry. Spectroscopic measurements were made, such as absorption, excitation, luminescence spectra, and luminescence decay time. Temperature measurements confirmed the high thermal stability of the investigated benitoite. The refractive index of BTSGO was estimated, as well as the value of its forbidden energy bandgap. The benitoite was characterized by blue emission, and the doped europium (III) ions possessed red emission, with the maximum at 612 nm. The intensity ratio of these bands can be tuned when changing the excitation wavelength, which allows tuning of the emission color of this material. [Display omitted]