The researchers, led by Mats R. Andersson from the Chalmers University of Technology in Sweden, synthesised the polymer from a widely available stannyl thiophene and an easily synthesised bromoisoindigo monomer. These were then coupled together using a Stille coupling reaction. Overall this represents just 3 steps and was achieved with a high overall yield of 68%.
The polymer itself is a low band-gap polymer with a donor–acceptor structure, which is important for harvesting photons from sunlight. The team found that the polymer exhibited promising performance when used in a PSC device and expect to be able to further improve this by varying the indigo groups.
If you would like to read more about this topic then download the ChemComm article for free today. Also, why not check out these other great ChemComm articles on PCSs?
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