Luminescence behaviour of Eu3+ in hot-compressed silicate glasses

Cherbib MA, Kapoor S, Bockowski M, Smedskjaer MM, Wondraczek L (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Journal of Non-Crystalline Solids: X Elsevier

Book Volume: 4

Article Number: 100041

DOI: 10.1016/j.nocx.2019.100041

Abstract

This paper aims to explore density-driven effects on the luminescence of Eu3+ doped silicate glasses. For this, mildly densified samples were fabricated by quasi-isostatic hot compression at up to 2 GPa from melt-quenched precursor materials. As a result of compression, both density and glass transition temperature of the blank (Eu free) and doped compositions increase. Raman spectroscopy indicates a slight increase in the intensity of vibrational modes assigned to small silicate rings and Si-O-Si bridges. Photoluminescence experiments reveal the creation of new paths of de-excitation, reducing the relative intensity of the transitions in the excitation spectra and the lifetime of the 5D0 → 7F2 emission line. Meanwhile, the luminescence intensity remains unchanged due to enhanced oscillator strength and refractive index at uniform electron-phonon coupling strength. Luminescence spectra also show a slight expansion of some of the energy levels of Eu3+, together with an increase of the bandwidth of the 5D0 → 7F2 emission line due to the crystal-field influence and growing electron population of the lower Stark sub-levels. Finally, increasing symmetry of Eu3+ sites was detected with increasing degree of compaction, resulting in a reduction of the intensity of the forced electric dipole transition of 5D0 → 7F2 relative to the magnetic dipole transition of 5D0 → 7F1.

Authors with CRIS profile

Lothar Wondraczek

Involved external institutions

Friedrich-Schiller-Universität Jena DE Germany (DE) Aalborg University DK Denmark (DK) Institute of High Pressure Physics (IHPP) / Instytut Wysokich Ciśnień (IWC) PL Poland (PL)

How to cite

APA:

Cherbib, M.A., Kapoor, S., Bockowski, M., Smedskjaer, M.M., & Wondraczek, L. (2019). Luminescence behaviour of Eu3+ in hot-compressed silicate glasses. Journal of Non-Crystalline Solids: X, 4. https://doi.org/10.1016/j.nocx.2019.100041

MLA:

Cherbib, Mohamed Atef, et al. "Luminescence behaviour of Eu3+ in hot-compressed silicate glasses." Journal of Non-Crystalline Solids: X 4 (2019).

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