Engineering and Architecture
Universitat Rovira i Virgili
Technologies for Nanosystems, Bioengineering and Energy
Study and development of polymer solar cells
Organic solar cells (OSCs) have seen a tremendous surge in power conversion efficiency in the last decade. Particularly, those made from bulk heterojunction solution-processed active layers have seen the highest potential for practical applications. In this respect, polymer and small molecule donors have both received extensive attention and as a result have led to PCE over 10 % when fabricated from a blend comprising a fullerene-based acceptor. Fullerenes such as PC60BM and PC70BM have dominated the field of solution-processed OPV. However, the high costs associated with fullerenes have driven the quest for less synthetically demanding acceptors. The perylenediimide (PDI) class of molecules, has shown to be a viable alternative to fullerene-based acceptors, with several acceptors showing PCEs over 5 %, and recently PDI-based dimers with a twisted configuration with PCE higher than 8 %.
The aim of our work will, therefore be the fabrication , characterization and study of organic solar cells based on a blend composed of a polymer donor and a library of PDI acceptors sharing an identical core however baring different substituents on their lateral bay or ortho position. The core of the acceptors will consist of two PDI dimers linked by a spirobifluorene group, which has shown to lead to enhanced film forming properties. The lateral substituents will be varied as to tune the crystallinity of the active layer to maximize electron transport properties. This would eventually allow us to significantly improve the PCE of the devices.
37.5 hours a week
|This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 713679|