Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5398906 | Journal of Luminescence | 2015 | 6 Pages |
Abstract
A Judd-Ofelt analysis was performed on a calcium scandate (CaSc2O4) ceramic sample doped with 2 at% Ho3+. Using the measured lifetime of 5I7 level to calibrate the absorption spectrum, the Judd-Ofelt parameters were obtained: Ω2 = 3.78Ã10â20 cm2, Ω4 = 5.17Ã10â20 cm2, and Ω6 = 1.92Ã10â20 cm2. The electric-dipole and magnetic-dipole transition probabilities, radiative lifetimes and luminescence branching ratios were calculated. The quantum efficiency of the green emitting levels (5F4, 5S2) was found: 54%. The calibration method also allowed the estimation of the 'effective' thickness of the ceramic sample: approximately eight times greater than the geometric thickness.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Åerban Georgescu, Angela Åtefan, Octavian Toma, Ana-Maria Voiculescu,