Artículos de revistas
Influence of the supramolecular arrangement in the electrical conductivity of poly(thiophene) thin films
Fecha
2017-01-01Registro en:
Journal of Nanoscience and Nanotechnology, v. 17, n. 1, p. 460-466, 2017.
1533-4899
1533-4880
10.1166/jnn.2017.12667
2-s2.0-85007570722
9727122203219263
9822212808651415
0000-0002-1345-0540
0000-0002-0114-6795
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
Thin films of regioregular polythiophene derivatives have had their optical, structural and morphological properties characterized, but there is still a lack of comparative studies to determine the effect from deposition techniques, especially on the electrical properties. In this study, we produced Langmuir-Schaefer and spin-coated films of regioregular alkyl-substituted polythiophene derivatives (P3AT) to investigate how distinct supramolecular arrangements can affect their properties. The Langmuir-Schaefer films deposited on indium-tin oxide substrates were observed to grow linearly with the number of layers, according to UV-visible absorption spectroscopy. Atomic force microscopy and Brewster angle microscopy were carried out for morphological characterization. From electrical transport measurements, the DC electrical conductivity of Langmuir-Schaefer films of P3AT was higher than the corresponding spin-coated films, which can be related to the dissimilar roughness and molecular-level organization provided by the Langmuir-Schaefer technique.