Emission spectra of Cs2KTbCl6 and Cs2KEuCl6, and Tb3+?Eu3+ non-radiative energy transfer in Cs2KTb0.9Eu0.1Cl6
Por:
Villafuerte-Castrejon M.E., Alvarez R.M.E., Caldiño G.U., Gonzolo J.
Publicada:
1 ene 2001
Resumen:
A spectral assignment of the first excited states of Tb3+ in Css2KTbCl6 and Eu3+ in Cs2KEuCl6 obtained from excitation and emission spectra is presented. A non-radiative energy transfer process from Tb3+ to Eu3+ ions was found to occur in Cs2KTb0.9Eu0.1Cl6. This process is strongly temperature dependent, such that it becomes quenched at low temperature. The most probable mechanisms responsible for such energy transfer are suggested for the case in which the Tb3+ 5D4 state is excited.
Filiaciones:
Villafuerte-Castrejon M.E.:
Inst. de Invest. en Materiales, UNAM, Ciudad Universitaria, A.P. 70-360, 04510 México, Mexico
Alvarez R.M.E.:
Inst. de Invest. en Materiales, UNAM, Ciudad Universitaria, A.P. 70-360, 04510 México, Mexico
Caldiño G.U.:
Inst. de Invest. en Materiales, UNAM, Ciudad Universitaria, A.P. 70-360, 04510 México, Mexico
Gonzolo J.:
Inst. de Invest. en Materiales, UNAM, Ciudad Universitaria, A.P. 70-360, 04510 México, Mexico
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