Author/Authors :
Duan، نويسنده , , Chang-Kui and Ko، نويسنده , , Chi-Chiu and Jia، نويسنده , , Guohua and Chen، نويسنده , , Xueyuan and Tanner، نويسنده , , Peter A.، نويسنده ,
Abstract :
Electronic absorption, excitation and time-resolved emission spectra of Tb3+ in the cubic elpasolite host lattice Cs2NaYF6 show that the 5D3–5D4 cross-relaxation is due to an electric quadrupole-electric dipole mechanism. The donor Tb3+ ion transits from 5D3 to 5D4 whilst the acceptor ion transits from 7F6 to 7F2 with the emission of an odd-parity phonon.
