Glass parameters affecting radiative lifetime for electronic transitions of luminescent dopants
Fouad El-Diasty1 & Manal Abdel-Baki2
Spectroscopic properties for P2
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 Bi2
decreases the P—O—P covalent bond by forming P—O—Bi bonds which were
associated with a conversion from Bi3+
ions. The calculated optical dielectric constant was increased with increasing bismuth oxide contents due to
the high polarizing power of Bi3+
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.
Physics department, Faculty of Science, Ain Shams University, Abbasia, 11566 Cairo, Egypt
Glass Department, National Research Centre, Dokki 12311 Giza, Egypt