Superior transport behavior of gold nanoparticles/P3HT blends by tuning optical and structural properties

Organic materials and blends have received a great deal of interests for application in large area, flexible, low-cost organic/hybrid electronics. In this work the optical, structural electrical behaviors new active layer system composed by functionalized gold nanoparticles (AuNPs) conjugated polymers, were investigated. For purpose, with diameter about 5 nm chosen, coated bifunctional π-conjugated ligand (9,9-didodecyl-2,7-bis(acetylthio)fluorene, FL) their high stability easy dispersibility organic solvents. The based on AuNPs regioregular poly-3-hexylthiophene (P3HT) prepared adding an increasing percentage weight nanoparticles, i.e. from 10% to 90 wt%, P3HT polymeric matrix. presence was confirmed UV-Vis spectroscopy, electron microscopy X-ray diffraction techniques. optical characterization composites demonstrated possibility tune behavior percentages into polymer Their inclusion results loss crystallinity simultaneous increase π-π interaction between polythiophene chain fluorene ligand. To better investigate films, Grazing Incident Diffraction (GIXD) measurements carried out blend containing 30 wt% reveals optimal condition, combining good order interconnectivity AuNPs/P3HT improvement conductivity all blends, that show higher values compared pristine materials. best performance is achieved resulting enhancement 350% pure polymer. This result could be interest realization conductive film use opto-electronic devices.