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Highly soluble air-stable conjugated decamers and polymers (compounds 1–6) with alternating “sulfur-overrich” bis(3,4′-S-alkyl)-2,2′-bithiophenes as the donor units and 2,1,3-benzothiadiazoles as the acceptor units were designed and expediently synthesized with the aid of microwave and ultrasound enabling technologies. Solid-state cyclovoltammetry showed that 1–6 had oxidation and reduction potentials in the range 0.6–0.9 V and −1/–1.2 V (vs SCE), respectively, with energy gaps below 2 eV. The electronic properties of spin-coated films of pure 1–6 were investigated with nanoscale resolution by Kelvin probe force microscopy (KPFM). KPFM measurements showed that charge generation and separation were obtained for all films under illumination. Consequently, 1–6 were tested on single-material organic solar cells (SMOCs). In agreement with KPFM results, photovoltaic behavior was observed for all …
American Chemical Society
Publication date: 
10 Dec 2015

Francesca Di Maria, Mariano Biasiucci, Francesco Paolo Di Nicola, Eduardo Fabiano, Alberto Zanelli, Massimo Gazzano, Elisabetta Salatelli, Massimiliano Lanzi, Fabio Della Sala, Giuseppe Gigli, Giovanna Barbarella

Biblio References: 
Volume: 119 Issue: 49 Pages: 27200-27211
The Journal of Physical Chemistry C