Electrophoresis Assisted Printing: A Method To Control the Morphology in Organic Thin Films
| Autor: | Peter Müller-Buschbaum, Alexander Hexemer, Salma Mansi, Oliver Filonik, Eric Schaible, Stephan Pröller, Fabian Eller, Chenhui Zhu, Eva M. Herzig |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Materials science Organic solar cell Energy conversion efficiency 02 engineering and technology Polymer engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Active layer Electrophoresis Photoactive layer Chemical engineering Coating chemistry engineering General Materials Science Thin film 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 12:5219-5225 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.9b18064 |
| Popis: | A major advantage of organic solar cells (OSC) is the processability out of solution allowing for advanced printing methods toward large-scale production. Controlling the blend morphology of solution coated active layers is a key challenge to optimize their power conversion efficiency. We have derived a printing procedure from an industrial coating process that facilitates tuning the nanomorphology of a blend of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) as model system for OSCs. Applying an electric field during printing and the film drying process modifies the vertical film composition of the photoactive layer and optimizes the polymer crystal orientation. The choice of chloroform as solvent allows us to obtain material transport within the wet film, due to an induced electrophoretic mobility. Tailoring the morphology improves the power conversion efficiency of the OSCs by up to 25%. Our findings indicate that electrophoresis assisted printing provides an efficient approach to optimize the active layer for various material and solvent combinations that exhibit an electrophoretic mobility. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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