Synthesis, characterization and photovoltaics studies of 3-alkylthienyl thiophene based polymers prepared via direct arylation polymerization

Geeta Saini1*, Vishal Sharma1, Vandna Luthra2 and R. P. Tandon1

1Department of Physics and Astrophysics, University of Delhi, New Delhi, 110007, India

2Department of Physics, Gargi College, University of Delhi, New Delhi, 110049, India 

Adv. Mater. Lett., 2017, 8 (7), pp 813-818

DOI: 10.5185/amlett.2017.1483

Publication Date (Web): May 23, 2017



The synthesis and characterization of two novel 3-thienyl based polythiophene derivatives PT and BT have been presented. These polymers have been synthesized by convenient and ecofriendly Pd catalyzed direct arylation polymerization method. In these polymers the alkyl side chain has been replaced by alkylthienyl side chain and polymer PT analogous to regioregular poly(3-hexylthiophene) (rr-P3HT) has been synthesized. These polymers have been characterized by 1H NMR, GPC, TGA and UV vis absorption spectroscopy. The absorption maxima of these polymers are comparable to the rr-P3HT. The polymers have very good solubility in common organic solvents and therefore the solution processing of these materials has been easily done. Solar cells of these polymers have been fabricated by using PT and BT as donor materials and PC61BM as acceptor material. It was observed that both the materials showed almost same photovoltaic characteristics. Solar cell performance of these materials has been found to be low and we are working on the optimization and improvement of power conversion efficiency of these materials.


Direct arylation polymerization, P3HT, thienyl thiophene, solar cell

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