920515-35-1Relevant articles and documents
Influence of different copolymer sequences in low band gap polymers on their performance in organic solar cells
Lange, Alexander,Krueger, Hartmut,Ecker, Bernhard,Tunc, Ali Veysel,Von Hauff, Elizabeth,Morana, Mauro
, p. 1622 - 1635 (2012/06/01)
The chemical design of a polymer can be tailored by a random or a block sequence of the comonomers in order to influence the properties of the final material. In this work, two sequences, PCPDTBT and F8BT (F8), were polymerized to form a block or a random copolymer. Differences between the various polymers were examined by exploring the surface topography and charge carrier mobility. A distinct surface texture and a higher charge carrier mobility was found for the block copolymer with respect to the other materials. Solar cells were prepared with polymer:PC71BM blend active layers and the best performance of up to 2% was found for the block copolymer, which was a direct result of the fill factor. Overall, the sequences of different copolymers for solar cell applications were varied and a positive impact on efficiency was found when the block copolymer structure was utilized.
Polymers with low band gaps and high charge mobility
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Page/Page column 15-16, (2010/08/11)
This disclosure relates to a polymer containing a first comonomer repeat unit and a second comonomer repeat unit different from the first comonomer repeat unit. The first comonomer repeat unit includes a cyclopentadithiophene moiety. The polymer can be used as a photoactive material in a photovoltaic cell. This disclosure also relates to such photovoltaic cells, as well as modules containing such photovoltaic cells.