The photoconductivity of a composite of poly-N-vinylcarbazole with carbocyanine dye improved by silicon nanoparticles
The effect of a hole transport layer (HTL) on the rate of charge carrier transfer from a photoconductor film to an electrode and the efficiency of charge carrier photogeneration was studied by the electrographic (EG) discharge method. The EG method, based on the analysis of the kinetics of the decay of the surface potential of an electrical charged layer of a photoconductor, was upgraded with the use of a field-effect transistor in an electrometer. On films of a composite of poly-N-vinylcarbazole with cyanine dye, it was shown that the use of HTL increases the rate of hole transfer to the electrode. An increase in the quantum efficiency of charge carrier photogeneration in the composite was achieved by incorporating n-type silicon nanoparticles into the HTL.