OPTICAL-PROPERTIES OF NEODYMIUM AND DYSPROSIUM DOPED HYBRID SILOXANE-OXIDE COATINGS

Hybrid organic-inorganic nanocomposites made of metal ore-polymers (zi rconium and neodymium ore or dysprosium oro species) linked to siloxan e species [(CH3)Si-O-3/2] exhibit luminescence. At low rare-earth-meta l (M=Dy, Nd) concentrations, the emission lifetime is mainly governed by energy-transfer processes between rare-earth-metal cations. At high er rare-earth-metal concentrations the emission lifetime is controlled by the interactions between rare-earth-metal cations and by an increa se of the quenching probability due to the vicinity of some residual h ydroxy groups. Energy transfer between Nd3+ ions and Rhodamine 6G co-i ncorporated inside these hybrid coatings is also demonstrated.