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An investigation on visible luminescence of Ho3+ activated LBTAF glasses
Different concentrations of Ho3+-doped lead borate titanate aluminum fluoride (LBTAFHo) glasses with chemical composition of PbO-H3BO3-TiO2-AlF3-Ho[ sub]2O3 were prepared by the melt quenching method. The spectral properties were investigated using the absorption, emission and decay measurements. Th...
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Published in: | Physica. B, Condensed matter Condensed matter, 2012-02, Vol.407 (3), p.523-527 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Different concentrations of Ho3+-doped lead borate titanate aluminum fluoride (LBTAFHo) glasses with chemical composition of PbO-H3BO3-TiO2-AlF3-Ho[ sub]2O3 were prepared by the melt quenching method. The spectral properties were investigated using the absorption, emission and decay measurements. The experimental oscillator strengths were calculated from the area under the absorption bands. Applying Judd-Ofelt theory, the intensity parameters ( Omega lambda =2, 4, 6) were calculated, by the least square fit approach from which the radiative transition rates, luminescence branching ratios and radiative decay times were determined. The photoluminescence spectra revealed the quenching of luminescence intensity beyond 1.0 mol% of Ho3+ ion concentration. To investigate the luminescence potentiality of 5F4 arrow right 5I8 emission level, the effective bandwidth and the stimulated emission cross-section were determined. The quenching in experimental decay time is attributed to the resonance energy transfer among the excited Ho3+ ions. |
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ISSN: | 0921-4526 1873-2135 |
DOI: | 10.1016/j.physb.2011.11.029 |