The Science & Technology
of Glass
Cambridge - Monday 4th to
Wednesday 6th September 2017



Fouad El-Diasty
<fdiasty@yahoo.com>

article posted 02 August 2017



Glass parameters affecting radiative lifetime for electronic transitions of luminescent dopants
Fouad El-Diasty1 & Manal Abdel-Baki2

Spectroscopic properties for P2O5(0.55-x)-MgO(0.45)–xBi2O3 glass system were studied, where the range of molar fraction was 0 ≤ x ≤ 0.07 mol%. Glass series were prepared by melt quenching technique to be used as a host glass for upconversion applications. Both density and molar volume were determined. The structural changes have been studied by FT-IR spectroscopy. The adding up of Bi2O3 decreases the P—O—P covalent bond by forming P—O—Bi bonds which were associated with a conversion from Bi3+ into Bi6+ ions. The calculated optical dielectric constant was increased with increasing bismuth oxide contents due to the high polarizing power of Bi3+ and Bi6+ ions and their small field strength. The factors that affect the radiative lifetime of electronic transitions for luminescent dopant ions impeded in the host glasses were studied as well.

Institutions:

1Physics department, Faculty of Science, Ain Shams University, Abbasia, 11566 Cairo, Egypt
2Glass Department, National Research Centre, Dokki 12311 Giza, Egypt