In order to establish the nature of luminescent centers in green-emitting electroluminescent thin film structures based on terbium-activated zinc sulfide, extended x-ray absorption fine structure (EXAFS) measurements were carried out using x-ray radiation from the 1.85 GeV-200 mA DCI storage ring in Orsay. Analysis of the EXAFS spectra at the Tb L~n edge gives direct evidence for the presence of Tb-containing clusters in films prepared by the Atomic Layer Epitaxy process. The polycations TbO § forming the clusters are very similar to those found in the crystal structure of Tb202S. ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 132.174.255.116 Downloaded on 2015-06-02 to IP

1992 luminescence, fluorescence luminescence, fluorescence (solids and liquids) D 6540 16 -019 EXAFS Study of Terbium Activated Zinc Sulfide Thin Films. -The nature of the luminescent centers in green emitting electroluminescent ZnS:Tb3+ thin film structures prepared by atomic layer epitaxy are studied by EXAFS. The results show the presence of Tb-containing clusters formed by (TbO)+ n polycations similar to those found in the Tb2O2S structure. -(CHARREIRE, Y.; MARBEUF, A.; TOURILLON, G.; LESKELAE, M.; NIIN-ISTOE, L.; NYKAENEN, E.; SOININEN, P.; TOLONEN, O.; J. Electrochem.