Energy transfer phenomena and Judd-Ofelt analysis on Sm3+ ions in K2GdF5 crystal

The Raman, absorption, luminescence spectra and lifetimes curves of Sm3+-doped K2GdF5were measured. Based on the Judd-Ofelt analysis, the values of radiative transition probabilities, branching ratios, integrated emission cross-sections and radiative lifetimes of excited states of Sm3+ in K2GdF5 cry...

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Published inJournal of luminescence Vol. 179; pp. 93 - 99
Main Authors Do, Phan Van, Tuyen, Vu Phi, Quang, Vu Xuan, Khaidukov, Nicholas M., TrongThanh, Nguyen, Sengthong, Bounyavong, Huy, Bui The
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.11.2016
Subjects
Crystal grown
Energy transfer
Inokuti-Hirayama
Judd-Ofelt
Optical spectroscopy
Inokuti-Hirayama
Optical spectroscopy
Crystal grown
Energy transfer
Judd-Ofelt
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Summary:The Raman, absorption, luminescence spectra and lifetimes curves of Sm3+-doped K2GdF5were measured. Based on the Judd-Ofelt analysis, the values of radiative transition probabilities, branching ratios, integrated emission cross-sections and radiative lifetimes of excited states of Sm3+ in K2GdF5 crystal were calculated. The migration of excitation energy between the Gd3+ ions and the trapping processes of Gd3+ excitation energy by Sm3+ and Tb3+ions in K2GdF5 crystal are reported. The role of the overlapping between the broad, allowed absorption bands of the RE3+ ions and the narrow absorption lines 6IJ and 6PJ of Gd3+ ions on the trapping rates of the RE3+ was discussed. The energy transfer between the Sm3+ ions was studied by the decay measurement, which has been fitted by Inokuti-Hirayama energy transfer model and revealed that electric dipole–quadrupole interaction is responsible for the energy transfer process in Sm3+ ions doped K2GdF5 crystal.
ISSN:0022-2313
1872-7883
DOI:10.1016/j.jlumin.2016.06.051