Temperature Dependence of Luminescence Decay from the 4G5/2 State of Sm3+ in Cs2NaSmxY1-xCl6 and Cs2NaSmxEuyY1-x-yCl6 |
| T. Luxbacher, H.P. Fritzer Institut für Physikalische und Theoretische Chemie, Technische Universität Graz, 8010 Graz, Austria and C.D. Flint Laser Laboratory, Department of Chemistry, Birkbeck College, 29, Gordon Square, London WC1H 0PP, U.K. |
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| Luminescence decay curves for the 4G5/2 → 6H7/2 emission of Sm3+ in the cubic hexachloroelpasolite crystals Cs2NaSmxY1-xCl6 (x=0.005 to x=1) and Cs2NaSmxEuyY1-x-yCl6 (x=0.01 to x=0.95, y=0.05 to y =0.99) have been measured over the temperature range 10 K to 300 K using pulsed laser excitation into the 4G5/2 state of Sm3+. The luminescence from this state is strongly quenched by cross relaxation to Sm3+ acceptors and energy transfer to the 5D0 state of Eu3+. The temperature dependence of cross relaxation and of energy transfer is discussed in terms of the involved mechanisms. |
| DOI: 10.12693/APhysPolA.90.307 PACS numbers: 33.50.Dq, 33.50.Hv, 78.55.Hx |