Sulfonate-Conjugated Polyelectrolytes as Anode Interfacial Layers in Inverted Organic Solar Cells
| Autor: | Benedetta M. Squeo, Roberto Sorrentino, Maristella Gussoni, Elisa Lassi, Simona Mrakic-Sposta, Mariacecilia Pasini, Guido Scavia, Francesco Galeotti, Barbara Vercelli, Silvia Luzzati |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Organic solar cell conjugated polyelectrolytes Pharmaceutical Science Conjugated system Article Analytical Chemistry lcsh:QD241-441 chemistry.chemical_compound anode interfacial layers Photoactive layer Electric Power Supplies lcsh:Organic chemistry Drug Discovery Side chain Electrochemistry Physical and Theoretical Chemistry inverted organic solar cells Electrodes Organic Chemistry Conjugated Polyelectrolytes Polyelectrolytes Anode Indium tin oxide Sulfonate chemistry Chemical engineering Chemistry (miscellaneous) Sunlight Molecular Medicine Sulfonic Acids |
| Zdroj: | Molecules Volume 26 Issue 3 Molecules, Vol 26, Iss 763, p 763 (2021) |
| ISSN: | 1420-3049 |
| DOI: | 10.3390/molecules26030763 |
| Popis: | Conjugated polymers with ionic pendant groups (CPEs) are receiving increasing attention as solution-processed interfacial materials for organic solar cells (OSCs). Various anionic CPEs have been successfully used, on top of ITO (Indium Tin Oxide) electrodes, as solution-processed anode interlayers (AILs) for conventional devices with direct geometry. However, the development of CPE AILs for OSC devices with inverted geometry is an important topic that still needs to be addressed. Here, we have designed three anionic CPEs bearing alkyl-potassium-sulfonate side chains. Their functional behavior as anode interlayers has been investigated in P3HT:PC61BM (poly(3-hexylthiophene): [6,6]-phenyl C61 butyric acid methyl ester) devices with an inverted geometry, using a hole collecting silver electrode evaporated on top. Our results reveal that to obtain effective anode modification, the CPEs’ conjugated backbone has to be tailored to grant self-doping and to have a good energy-level match with the photoactive layer. Furthermore, the sulfonate moieties not only ensure the solubility in polar orthogonal solvents, induce self-doping via a right choice of the conjugated backbone, but also play a role in the gaining of hole selectivity of the top silver electrode. |
| Databáze: | OpenAIRE |
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