Abstract
For the first time much more intense 4G5/2 → 6H9/2 transition than others 4G5/2→6HJ/2 transitions of the Sm3+-doped oxides have been observed.The Sm3+–doped LaKNaTaO5 single crystals have been grown by the flux growth method. The emission and excitation spectra as well as decay profiles of the 4G5/2 luminescent level of the Sm3+ ion have been measured. The decay curve has been fitted by the Inokuti-Hirayama energy transfer model which revealed that electric dipole-dipole interaction is responsible for the energy transfer processes in the Sm3+:LaKNaTaO5 single crystals. The title phosphors may be potentially used as red phosphor for white light-emitting diodes.
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