A bifunctional conjugated polyelectrolyte for the interfacial engineering of polymer solar cells
| Autor: | Silvia Luzzati, Sergio Brovelli, Francesco Carulli, Elisa Lassi, Umberto Giovanella, Guido Scavia, Francesco Galeotti, Mariacecilia Pasini |
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| Přispěvatelé: | Carulli, F, Scavia, G, Lassi, E, Pasini, M, Galeotti, F, Brovelli, S, Giovanella, U, Luzzati, S |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
02 engineering and technology 010402 general chemistry 01 natural sciences Polymer solar cell law.invention Biomaterials Polyfluorene chemistry.chemical_compound Colloid and Surface Chemistry Polyfluorene derivatives law Side chain polymeric solar cells chemistry.chemical_classification Kelvin probe force microscope Energy conversion efficiency Polymer 021001 nanoscience & nanotechnology Cathode 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Dielectric spectroscopy chemistry Chemical engineering Alcohol soluble interlayer Interfacial engineering Polymeric solar cell Polyfluorene derivative 0210 nano-technology |
| Zdroj: | Journal of colloid and interface science 538 (2019): 611–619. doi:10.1016/j.jcis.2018.12.027 info:cnr-pdr/source/autori:Francesco Carulli, Guido Scavia, Elisa Lassi, Mariacecilia Pasini, Francesco Galeotti, Sergio Brovelli, Umberto Giovanella, Silvia Luzzati/titolo:A bifunctional conjugated polyelectrolyte for the interfacial engineering of polymer solar cells/doi:10.1016%2Fj.jcis.2018.12.027/rivista:Journal of colloid and interface science (Print)/anno:2019/pagina_da:611/pagina_a:619/intervallo_pagine:611–619/volume:538 |
| ISSN: | 1095-7103 |
| DOI: | 10.1016/j.jcis.2018.12.027 |
| Popis: | In this work a novel combination of side chain functionalities, alkyl-phosphonate (EP) and alkyl-ammonium bromide (NBr) groups, on a polyfluorene backbone (PF-NBr-EP) was studied as cathode interfacial material (CIM) in polymer-based solar cells. The devices were made with a conventional geometry, with PTB7:PC71 BM as active layer and aluminum as metal electrode. The CIM showed good solubility in ethanol and film forming ability onto the active layer so that its deposition could be finely tuned. The interface engineering imparted by this CIM was assessed and discussed through kelvin probe force microscopy (KPFM), impedance spectroscopy, charge recombination and electron transport characterizations. To discriminate between the interfacial modifications imparted by the interlayer and its solvent, we included in this study a surface ethanol treated device. In the optimized conditions an average power conversion efficiency of 7.24% was obtained, which is about 60% higher when compared to devices made with bare Al and 26% when compared to devices made with a standard calcium/aluminum cathode. Besides performances, some insights about the devices shelf life stability are also presented. A good persistency through aging was found for the cathode interfacial engineering capabilities of PF-NBr-EP. |
| Databáze: | OpenAIRE |
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