Abstract
The absorption and fluorescence spectra of Pr(DBM) 3(TPPO) 2 (DBM: dibenzoylmethane, TPPO: triphenylphosphine oxide) containing poly(methyl methacrylate) (PMMA) were measured. The energy levels are assigned and analyzed in terms of the free-ion Hamiltonian model. From the data available in the absorption spectrum, various spectroscopic parameters such as the spherically symmetric part of the free-ion Hamiltonian ( E AVG), Slater–Condon ( F 2, F 4, F 6), spin-orbit interaction ( ζ), Judd–Ofelt ( Ω 2, Ω 4, Ω 6) parameters and the reduced matrix elements are derived. The radiative properties of Pr(DBM) 3(TPPO) 2 containing PMMA were also predicted according to the Judd–Ofelt theory. The values of the fluorescence branching ratio and the emission cross section of 3P 0 → 3F 2 fluorescence transition revealed that Pr(DBM) 3(TPPO) 2 containing PMMA is an efficient luminescent material.
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