Spectroscopy study of SrAl2O4:Eu3+

Synthesis, luminescence and persistent luminescence of europium-doped strontium aluminates

“…The extensive literature for rare-earth doped CaF2 supports this results, as tetragonal and trigonal charge compensations with interstitial fluoride ions are commonly observed [180,181]. The analysis of the crystal structure of SA [179] shows that there are two different voids labelled V1 and V2 (Figure 5). There are three voids (V1) located at 294.6, 297.2 and 308.1 pm from the strontium atom on site 2, and three voids (V2) located at 278.0,279.8 and 333.8 pm from the strontium atom on site 1.…”

“…In this work, DFT simulations also indicate that Eu and Dy would incorporate onto adjacent Sr sites along the [012] direction, which can enable the energy transfer related to the persistent emission. The doping of SA with Eu 3+ has been studied experimentally and theoretically by dos Santos et al [179]. These authors considered theoretically the following substitution reactions: Substitution at the Al site: The lowest-energy charge compensation mechanism involves substitution at the Sr site with oxygen interstitial compensation.…”

Modeling the Performance of Dy3+‐Based Boltzmann Thermometers by the Judd–Ofelt Theory

“…The integrated emission intensity for the transition SLJ→S'L’J’ is given by: [ 25,26 ] $$\begin{equation}{I_{SLJ \to S'L^{\prime}J^{\prime}}} = \smallint {i_{SLJ \to S'L^{\prime}J^{\prime}}}\left( {\tilde \nu } \right)d\tilde \nu {\rm{\;}} = {\rm{\;}}h{\tilde \nu _{SLJ \to S'L^{\prime}J^{\prime}}}{N_{SLJ}}{A_{SLJ \to S'L^{\prime}J^{\prime}}}\end{equation}$$…”

Luminescence Intensity Ratio Thermometry with Er3+: Performance Overview

“…Ω λ are the JO intensity parameters, obtained semi-empirically or by the ab initio calculations (from the crystal-field parameters). The integrated emission intensity for the transition SLJ→S L J is given by [30,31]:…”