Judd–Ofelt Parametrization from the Emission Spectrum of Pr<sup>3+</sup> Doped Materials: Theory, Application Software, and Demonstration on Pr<sup>3+</sup> Doped YF<sub>3</sub> and LaF<sub>3</sub>
Aleksandar Ćirić, Zoran Ristić, Tanja Barudžija, A.M. Srivastava, Miroslav D. Dramićanin
Abstract
Abstract Judd–Ofelt (JO) theory explains the optical properties of trivalent lanthanides using only three intensity parameters. The JO parametrization is a complicated procedure of absorption spectra analysis, especially cumbersome for powders and non‐transparent materials. For the Pr 3+ activated materials, the procedure is additionally complicated due to strong interaction of low‐lying Pr 3+ 4f5d energy levels with the 4f levels. Here, the straightforward JO parametrization method that uses the emission spectrum and the excited state lifetime of the Pr 3+ 3 P 0 level which does not require any fitting procedure are shown. In addition, the theory and software for calculations of JO parameters from Pr 3+ emission are explained. The method requirements are low‐temperature photoluminescence measurements of Pr 3+ introduced in low phonon energy hosts with a relatively high lying 4f5d energy level. The method is demonstrated on emissions of YF 3 :Pr 3+ and LaF 3 :Pr 3+ powders.