Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV18)
DOI: https://doi.org/10.29363/nanoge.hopv.2018.152
Publication date: 21st February 2018
Blends of semiconducting (SC) and ferroelectric (FE) polymers are interesting for applications such as resistive memories and organic photovoltaics (OPV). For OPV, the rationale is that the local electric field associated with the FE dipoles in a blend could aid in the dissociation of photogenerated excitons, thus improving power conversion efficiency. Unfortunately, many FE polymers either require solvents or processing steps that are incompatible with those required for SC polymers. Incorporating SC and FE components into block copolymers offers a path to facile fabrication of thin films from suitably chosen solvents. In this work, we investigate the photophysical properties of SC-FE block copolymers based on Poly-3-hexylthiophene (P3HT) and either Poly-vinylidene-difluoride (PVDF) or Poly-vinylidene-difluoride-trifluoroethylene (PVDF-TrFE).
Our results show that both copolymers exhibit similar photophysical behaviour to P3HT in solution. However, large morphological differences depending on the choice of FE building blocks, and the creation of a new ultrafast radiative decay channel are observed in solid state. Finally, after optimising film deposition via spin-coating, we present the results of fabricated solar cells utilising PVDF-TrFE as an additive to the active layer.
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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