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Optical properties and concentration dependence of the luminescence of Pr 3+ ion in fluoroindate glass
Author(s) -
Mazurak Z.,
Pisarski W. A.,
GabryśPisarska J.,
Żelechower M.
Publication year - 2003
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200301745
Subject(s) - excited state , ion , radiative transfer , luminescence , atomic physics , analytical chemistry (journal) , phonon , absorption (acoustics) , materials science , stimulated emission , chemistry , physics , optics , laser , condensed matter physics , optoelectronics , organic chemistry , chromatography
Optical absorption and emission spectra are presented for Pr 3+ and Pr 3+ + Cr 3+ ions in fluoroindate glass. Also, X‐ray diffraction (XRD) and differential scanning calorimetry (DSC) measurements are carried out in order to characterize investigated materials. The measured oscillator strengths and radiative rates for several transitions of the Pr 3+ ion are compared with calculated values. Radiative transition rates for the excited states are determined by using the Judd–Ofelt theory. Energy transfer effects account for the non‐radiative transitions. Although the Judd–Ofelt analysis does not yield the same excellent consistency for Pr 3+ as for Nd 3+ and Er 3+ , the experimental observations are consistent with Judd–Ofelt calculations. The linear concentration quenching and exponential decay times of the 1 D 2 level are explained assuming cross‐relaxation and energy transfer between the Pr 3+ ions. Energy level diagrams of Cr 3+ and Pr 3+ reveal that the 1 G 4 level of Pr 3+ lies close in energy to the 4 T 2 fluorescent level of Cr 3+ , and hence will expect a portion of excitation energy from Cr 3+ . Unfortunately, the mismatch in energy of this Pr 3+ level with the 4 T 2 level of Cr 3+ (∼3000 cm –1 ) cannot be compensated for by the phonons of the host, having an energy of about 500 cm –1 .