Seminar Announcement: Lidia Zur

Data pubblicazione: 22-mar-2015 1.27.08

Announcement

Tuesday, 03 March 2015, 15:00

Sala Grande Palazzina B via alla Cascata 56/C

"Luminescence properties of trivalent lanthanides in glasses and glass-ceramics obtained by high-temperature melt-quenching technique and sol-gel method"

Lidia Żur

Institute of Chemistry, University of Silesia,

Szkolna 9, 40-007 Katowice, Poland

Abstract

Influence of glass-former oxides and glass modifiers on luminescence properties of Eu³⁺, Dy³⁺, Tb³⁺ and Er³⁺ ions in selected heavy metal glasses was investigated. In particular, red-to-orange R/O (Eu³⁺), yellow-to-blue Y/B (Dy³⁺) and green-to-blue (Tb³⁺) luminescence intensity ratios were examined as a function of glass host composition.

Measured lifetimes for ⁵D0 (Eu³⁺), ⁴F_9/2 (Dy³⁺), ⁵D₄ (Tb³⁺) and ⁴I_13/2 (Er³⁺) excited states of trivalent lanthanide ions in the studied heavy metal glass systems were also determined from luminescence decay measurements. Correlation between luminescence intensity ratios, measured lifetimes and the composition of the glass hosts was proposed. Moreover, the luminescence properties of Eu³⁺ in glass-ceramic materials obtained via sol-gel method are presented and discussed in details.

Keywords: Rare earth ions photoluminescence; Glasses; Glass ceramics; Melt quenching technique; Sol-gel method.