Effect of molar mass and regioregularity on the photovoltaic properties of a reduced bandgap phenyl‐substituted polythiophene |
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| Authors: | Farid Ouhib Guillaume Dupuis Rémi de Bettignies Séverine Bailly Abdel Khoukh Hervé Martinez Jacques Desbrières Roger C Hiorns Christine Dagron‐Lartigau |
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| Institution: | 1. IPREM (EPCP) UMR 5254, Université de Pau et des Pays de l'Adour, 2 avenue President Angot, 64053 Pau, France;2. INES‐RDI DRT/LITEN/DTS/LCS Savoie Technolac BP 332, 50 avenue du lac Léman, 73377 Le Bourget du Lac, France;3. CNRS, IPREM (EPCP) UMR 5254, 2 avenue President Angot, 64053 Pau, France;4. IPREM (ECP) UMR 5254, Université de Pau et des Pays de l'Adour, 2 avenue President Angot, 64053 Pau, France |
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| Abstract: | Among the numerous reduced bandgap polymers currently being developed, poly3‐(4‐octylphenyl)thiophene)]s (POPT) may present attractive properties for organic solar cells due to its facile preparation and improved absorption with respect to poly(3‐hexylthiophene). This article appraises methods of preparation, including the use of diphenyl ether as a reaction medium, and discusses the effects of variations in molar masses, from about 3200 to 65,000 g mol?1 and regioregularity on its optoelectronic properties. The photovoltaic properties of POPT with 6,6]‐phenyl C61 butyric acid methyl ester (PCBM) in bulk heterojunction devices are also discussed in the light of morphological variations, as indicated by atomic force microscopy characterizations. With an initial screening of conditions, namely POPT:PCBM ratios and deposition solvent, a power conversion efficiency of 1.58% was obtained using a relatively high molar mass POPT sample. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012 |
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| Keywords: | chain growth polymerization polythiophenes conjugated polymers Grignard metathesis chain growth polymerizations [6 6]‐phenyl C61 butyric acid methyl ester (PCBM) photovoltaic devices poly[3‐(4‐octylphenyl)thiophene] |
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