Abstract
The photoconductive properties of a hybrid material based on poly(N-vinylcarbazole) (PVK) doped with nanoparticles of lithium niobate $({\text{LiNbO}}_{3})$ have been studied. The experiments were carried out using modulated photocurrent and non-steady-state photo-emf techniques at 633 nm wavelength. The photoconductivity of the composite increases remarkably with the nanoparticle content. This growth is related to larger drift lengths of the photoholes at higher nanoparticle concentrations. The reason for this enhancement is an increase in the effective photohole lifetime due to trapping of electrons on the nanoparticles and creation of recombination barriers at the polymer/nanoparticle interface.
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