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EnglishThe synthesis and properties of three copolymers obtained through a Knoevenagel polycondensation are reported. They are soluble in organic solvents, filmable, and solvatochromic. They are characterized through gel permeation chromatography, NMR and UV-vis spectroscopies, cyclic voltammetry, and atomic force microscopy. They display some proneness to form p-stacks, broad absorptions up to about 700 nm, highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energies that fit those of [6,6]-phenyl-C61-butyric acid methyl ester ([60]PCBM). The polymers are incorporated in blends with PCBM within bulk heterojunction devices. The best results are found for polymer solar cells obtained from P1 (2.7% power conversion efficiency). The insertion of alkylsulfanyl chains improves the photovoltaic performances, with respect to those of alkyl-substituted analogous polymers. The Jsc of the devices are greatly enhanced, supporting the employment of (alkylsulfanyl)thienyl units as base units in photoactive materials. (Figure presented.).
| Titolo: | Polymers with Alkylsulfanyl Side Chains for Bulk Heterojunction Solar Cells: Toward a Greener Strategy | |
| Autore/i: | Tassinari, Francesco; Libertini, Emanuela; Parenti, Francesca; BALLARIN, BARBARA; Nicola, Francesco Paolo Di; LANZI, MASSIMILIANO; Mucci, Adele | |
| Autore/i Unibo: | ||
| Anno: | 2017 | |
| Rivista: | ||
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1002/macp.201700111 | |
| Abstract: | The synthesis and properties of three copolymers obtained through a Knoevenagel polycondensation are reported. They are soluble in organic solvents, filmable, and solvatochromic. They are characterized through gel permeation chromatography, NMR and UV-vis spectroscopies, cyclic voltammetry, and atomic force microscopy. They display some proneness to form p-stacks, broad absorptions up to about 700 nm, highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energies that fit those of [6,6]-phenyl-C61-butyric acid methyl ester ([60]PCBM). The polymers are incorporated in blends with PCBM within bulk heterojunction devices. The best results are found for polymer solar cells obtained from P1 (2.7% power conversion efficiency). The insertion of alkylsulfanyl chains improves the photovoltaic performances, with respect to those of alkyl-substituted analogous polymers. The Jsc of the devices are greatly enhanced, supporting the employment of (alkylsulfanyl)thienyl units as base units in photoactive materials. (Figure presented.). | |
| Data stato definitivo: | 2020-02-26T21:48:30Z | |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
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