Synthesis of Photoresponse Hybrid Nanostructures for Transferring Electrons: A Polymerization to Connect Poly(N-vinylcarbazole)-ZnO Heterojunction with Carbon Nanotubes

摘要

Concerned with the issue of electron transfer in the photoresponse heterojunctions consisting of the conjugated polymers and nanocrystal semiconductors, this work uses nanocrystals-initiated polymerization to combine the one-dimensional nanostructures with the heterojunction. The ZnO nanocrystals, which are placed on carbon nanotubes, are photoexcited for initiating polymerization of N-vinylcarbazole. The synthesized nanocomposites are characterized by transmission electron microscopy, photoluminescence spectroscopy, infrared spectroscopy and electron paramagnetic resonance spectroscopy. By using Raman and X-ray photoelectron tools, we clearly reveal the strong interactions in the as-synthesized composites. The films of the materials are measured about photocurrents and current voltage characteristics. The results indicate the remarkable enhancements in these photoresponse properties due to carbon nanotube component. Spectral analysis is carried out to examine the effects of the nanotube component in the composite on the electron transfer.