Fine spectroscopic study of Pr3+ doped Sr0.7La0.3Mg0.3Al11.7O19 (Pr:ASL)

Abstract Single crystals of Pr3+ doped hexa-aluminate Sr0·7La0·3Mg0·3Al12O19 (ASL) were prepared for spectroscopic characterization. We investigated their optical spectroscopic properties in σ and π polarization of light. Absorption spectra were recorded in extended spectral range, 400 nm–5400 nm. Energies of Pr3+ crystal field states were determined. In addition to the major D3h sites, minor sites were found. Judd-Ofelt analysis was performed: the J-O parameters Ωt were determined to be 1.06 × 10−20 cm−2, 2.31 × 10−20 cm−2 and 3.43 × 10−20 cm−2 for t = 2, 4 and 6, respectively. The radiative lifetime was 38 μs for the emitting state 3P0.