Photorefractive and electroluminescent organics

Conjugated polymers and organic molecules combine transport and light-emitting properties that enable their use in electroluminescent devices for display applications. In this field, we have made the following advances: (i) fabricated and characterized ultra-bright electroluminescent devices using LiF-Al, and alloys of Al and LiF cathodes; (ii) studied the optical gain properties of the conjugated polymer BEH:PPV and the origin of the spectrally narrow emission observed in these polymers above threshold for stimulated emission; (iii) demonstrated several optically pumped laser structures using a conjugated polymer in devices where feedback was provided in different ways.