Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.474
Publication date: 16th December 2024
The efficiency of polymer solar cells (PSCs) has made impressive progress in the last few years. Still, the synthetic complexity of some of the best performing materials is high and is a possible bottleneck towards scalable commercial applications. In this work we present a new class of donor polymer that can be prepared in just two steps from commercially available starting materials.[1] The simplicity of the synthesis allowed a library of polymers with differing alkyl-chain lengths and comonomers to be readily prepared and investigated. The thermal, electrochemical and photophysical properties of the resulting polymer library helped towards the development of structure-property design guidelines. The polymers were furthermore investigated as donor materials in solar cell devices with Y6 and L8BO as acceptor, with the best performing material FO6-T showing highly promising power conversion efficiencies (PCEs) of 15.4 %. Recently, we also showed that our polymer FO6-T is compatible with green solvents such as 1,2-xylene and 2-MeTHF.[2] In order to study the scalability and commercial viability of the newly synthesised donors compared to state-of-the-art materials, I conducted a synthetic complexity (SC) analysis, which takes into account different industrially relevant parameters, such as hazardous chemicals involved and the number of synthetic steps, and we found that our material shows one of the lowest SC for well-performing donor materials to date.
We believe that these materials are highly promising for commercial application in PSCs due to strong device performance and a low cost and truly simple two step synthetic protocol.
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