Photovoltaic cells based on polythiophenes carrying lateral phenyl groups
LARTIGAU-DAGRON, Christine
Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux [IPREM]
< Réduire
Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux [IPREM]
Langue
en
Article de revue
Ce document a été publié dans
Thin Solid Films. 2008, vol. 516, n° 20, p. 7199-7204
Elsevier
Résumé en anglais
Highly regioregular poly[3-(4-octylphenylthiophene)] (POPT) was prepared to study the influence of phenyl groups as substituents on photovoltaic and thermal properties with respect to poly(3-hexylthiophene) (P3HT). The ...Lire la suite >
Highly regioregular poly[3-(4-octylphenylthiophene)] (POPT) was prepared to study the influence of phenyl groups as substituents on photovoltaic and thermal properties with respect to poly(3-hexylthiophene) (P3HT). The UV-visible absorption spectra of spin-coated films of POPT exhibited an extended absorption towards the near infrared. Differential scanning calorimetry showed the poor tendency of POPT to crystallise. In order to retain the extension in absorption and increase crystallinity, poly(3-hexylthiophene)-block-poly(3-tolylthiophene) (P3HT-b-P3TT) samples with varying ratios of P3HT and P3TT were prepared. Thermal fractionation by successive self-nucleation and annealing indicated that crystallites of P3HT were influenced by the P3TT block within the copolymers. Thermogravimetric analysis showed that thermal stabilities increased with increasing fractions of phenyl groups. Photovoltaic results of these materials blended with [6,6]-phenyl C61 butyric acid methyl ester (PCBM) are presented and discussed. © 2007 Elsevier B.V. All rights reserved.< Réduire
Origine
Importé de halUnités de recherche