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ENERGY TRANSFER PROCESS BETWEEN <TEX>$Ce^{3+}$</TEX> AND <TEX>$Tb^{3+}$</TEX> IN LaOCl HOST
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1993, v.6 no.3, pp.319-328
Kim,
T., Sung,
H., Kim,
K., Ha,
Y., Chang,
J., &
Song,
S.
(1993). ENERGY TRANSFER PROCESS BETWEEN <TEX>$Ce^{3+}$</TEX> AND <TEX>$Tb^{3+}$</TEX> IN LaOCl HOST. Analytical Science and Technology, 6(3), 319-328.
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Abstract
Energy transfer process between <TEX>$Tb^{3+}$</TEX> and <TEX>$Ce^{3+}$</TEX> has been studied in LaOCl host. The energy absorbed by <TEX>$Ce^{3+}$</TEX> transfers to <TEX>$Tb^{3+}$</TEX> which has levels emitting strong fluorescence. The probability of energy transfer depends strongly on the concentration or the distance of activator ions. While the energy transferred on <TEX>$Tb^{3+}$</TEX> emits from <TEX>$^5D_3$</TEX> level at low concentration of <TEX>$Ce^{3+}$</TEX>, the energy goes back to <TEX>$Ce^{3+}$</TEX>(Back Transfer) and then emits from low levels of <TEX>$Ce^{3+}$</TEX> and <TEX>$Tb^{3+}$</TEX> at the high concentration. The Back Transfer process has been identified by the experiment with varying the concentration of the activator, <TEX>$Ce^{3+}$</TEX>. The relaxation is more effective if <TEX>$Ce^{3+}$</TEX> intermediates than if not.
- keywords
- Energy transfer, LaOCl, Cross relaxation, Fluorescence
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