Abstract
The photorefractive (PR) properties, via photoconductivity, birefringence and two-beam-coupling experiments, of a composite containing a fullerene–trinitrofluorenone (C 60–TNF) dyad in which the two moieties are linked by a conformationally flexible polyether chain are reported. The PR performance of this compound as a sensitizer in polymer composites based on poly( N-vinylcarbazole) (PVK) as hole charge transporter, piperidindicyanostyrene (PDCST) as non-linear optical chromophore and butyl benzyl phthalate (BBP) as plasticizer, has been compared to those of the corresponding C 60 and TNF derivatives. Results show that the linkage of C 60 and TNF leads to an improvement in the photoconductivity of the composite leading to an increase of the PR speed.
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