Dependence of Eu3+ photoluminescence properties on structural transformations in diopside-based glass-ceramics
ALLU, Amarnath R.
Centre d'Etudes Lasers Intenses et Applications [CELIA]
Glass Science and Technology Section
Department of Materials and Ceramics Engineering
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Centre d'Etudes Lasers Intenses et Applications [CELIA]
Glass Science and Technology Section
Department of Materials and Ceramics Engineering
ALLU, Amarnath R.
Centre d'Etudes Lasers Intenses et Applications [CELIA]
Glass Science and Technology Section
Department of Materials and Ceramics Engineering
< Leer menos
Centre d'Etudes Lasers Intenses et Applications [CELIA]
Glass Science and Technology Section
Department of Materials and Ceramics Engineering
Idioma
en
Article de revue
Este ítem está publicado en
Journal of Alloys and Compounds. 2017, vol. 699, p. 856-865
Elsevier
Resumen en inglés
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 ...Leer más >
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.< Leer menos
Palabras clave en inglés
Diposide
Akermanite
Photoluminescence
Quantum efficiency
Proyecto ANR
Initiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003
Orígen
Importado de HalCentros de investigación