Reduced Intramolecular Twisting Improves the Performance of 3D Molecular Acceptors in Non-Fullerene Organic Solar Cells

Lin HR; Chen SS; Hu HW; Zhang L; Ma TX; Lai JYL; Li ZK; Qin AJ; Huang XH; Tang BZ; Yan H

Advanced Materials, Vol.28, No.38, 8546-8551, 2016

DOI10.1002/adma.201600997 Export Citation

Reduced Intramolecular Twisting Improves the Performance of 3D Molecular Acceptors in Non-Fullerene Organic Solar Cells

Lin HR, Chen SS, Hu HW, Zhang L, Ma TX, Lai JYL, Li ZK, Qin AJ, Huang XH, Tang BZ, Yan H

A small-molecular acceptor, tetraphenyl-pyrazine-perylenediimide tetramer (TPPzPDI 4), 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 4 exhibits the highest aggregation tendency and electron mobility, and therefore achieves a highest power conversion efficiency of 7.1%.

Keywords:high mobility;reduced intramolecular twisting;small-molecular acceptors;structural-property relationships;twisted 3D structures