Dependence of Eu3+ photoluminescence properties on structural transformations in diopside-based glass-ceramics

Abstract

Herein, diopside based glass-ceramics (GCs) were produced by sintering of glass powder compacts at 850 °C for 300 h. A special attention was paid on understanding the influence of structural transformations upon substituting strontium for calcium on the Eu3+ emission behavior. X-ray diffraction and Raman spectra showed the formation of diopside (CaMgSi2O6) in Sr-free glasses. Introduction of Sr led to the appearance of Sr-akermanite (Sr2MgSi2O7), whose formation increased continuously with increasing Sr/Ca ratio. The photoluminescence spectra exhibited intense 5D0 →7Fj transitions of Eu3+ ions. The intensity parameters (Ω2 and Ω4) and the Eu–O ligand behavior were determined using the Judd-Ofelt (JO) theory from the emission spectra as a function of various Sr concentrations. The as obtained JO intensity parameters Ω2 (5.31–5.21 pm2) and Ω4 (4.89–5.84 pm2) indicated the ligand behavior of the Eu–O bonds and a high asymmetrical and covalent environment around Eu3+ ions in the present host matrix. In comparison with other Eu3+-doped GCs, diopside based GCs containing high fraction of SrO exhibited adequate photoluminescence for optical lighting and display devices.

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BibTeX RIS

BibTeX

@article{allu2026dependence,
  title = {{Dependence of Eu3+ photoluminescence properties on structural transformations in diopside-based glass-ceramics}},
  author = {Amarnath R. Allu and Subrata Das and S. Som and Harsha Vardhan R. Maraka and Sathravada Balaji and Luis F. Santos and Inka Manek-Hönninger and Veronique Jubera and José M.F. Ferreira},
  journal = {Journal of Alloys and Compounds},
  year = {2026},
  month = sep,
  doi = {10.1016/j.jallcom.2016.12.438},
  url = {https://hal.science/hal-01497551v1},
  note = {CC BY 4.0},
}

RIS

TY  - JOUR
TI  - Dependence of Eu3+ photoluminescence properties on structural transformations in diopside-based glass-ceramics
AU  - Amarnath R. Allu
AU  - Subrata Das
AU  - S. Som
AU  - Harsha Vardhan R. Maraka
AU  - Sathravada Balaji
AU  - Luis F. Santos
AU  - Inka Manek-Hönninger
AU  - Veronique Jubera
AU  - José M.F. Ferreira
PY  - 2026
DA  - 2026/09/09
JO  - Journal of Alloys and Compounds
DO  - 10.1016/j.jallcom.2016.12.438
UR  - https://hal.science/hal-01497551v1
AB  - Herein, diopside based glass-ceramics (GCs) were produced by sintering of glass powder compacts at 850 °C for 300 h. A special attention was paid on understanding the influence of structural transformations upon substituting strontium for calcium on the Eu3+ emission behavior. X-ray diffraction and Raman spectra showed the formation of diopside (CaMgSi2O6) in Sr-free glasses. Introduction of Sr led to the appearance of Sr-akermanite (Sr2MgSi2O7), whose formation increased continuously with increasing Sr/Ca ratio. The photoluminescence spectra exhibited intense 5D0 →7Fj transitions of Eu3+ ions. The intensity parameters (Ω2 and Ω4) and the Eu–O ligand behavior were determined using the Judd-Ofelt (JO) theory from the emission spectra as a function of various Sr concentrations. The as obtained JO intensity parameters Ω2 (5.31–5.21 pm2) and Ω4 (4.89–5.84 pm2) indicated the ligand behavior of the Eu–O bonds and a high asymmetrical and covalent environment around Eu3+ ions in the present host matrix. In comparison with other Eu3+-doped GCs, diopside based GCs containing high fraction of SrO exhibited adequate photoluminescence for optical lighting and display devices.
SN  - 0925-8388
ER  -

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