Organic photorefractive material design strategies

Abstract

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 plasticizer 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-linear optical chromophore moieties. Both classes of materials are characterized by holographic, photoconductive, and ellipsometric methods.