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Organic photorefractive material design strategies

We seek to improve the performance of organic photorefractive (OPR) systems by implementing two different design philosophies. In one strategy polysiloxane-based charge transport polymers are used to explore the requirement of a low glass transition temperature. These polymers allow construction of low Tg composites without plasticizcer and additionally may have higher charge mobility than poly(n-vinyl carbazole).The other strategy entails the use of small-molecule organic glasses composed of covalently attached charge transport and non-linrar optical chromophore moieties. Both classes of materials are characterized by holographic, photoconductive, and ellipsometric methods.