Reduced Intramolecular Twisting Improves the Performance of 3D Molecular Acceptors in Non-Fullerene Organic Solar Cells.
basic_science · Level V
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- Record sourced from PubMed, PMID 27501996.
- Also identified by DOI 10.1002/adma.201600997.
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Abstract
A small-molecular acceptor, tetraphenylpyrazine-perylenediimide tetramer (TPPz-PDI<sub>4</sub> ), which has a reduced extent of intramolecular twisting compared to two other small-molecular acceptors is designed. Benefiting from the lowest extent of intramolecular twisting, TPPz-PDI<sub>4</sub> exhibits the highest aggregation tendency and electron mobility, and therefore achieves a highest power conversion efficiency of 7.1%.