Zhang, Xiaohua published the artcileSystematically Controlling Acceptor Fluorination Optimizes Hierarchical Morphology, Vertical Phase Separation, and Efficiency in Non-Fullerene Organic Solar Cells, Name: Dimethyl itaconate, the publication is Advanced Energy Materials (2022), 12(1), 2102172, database is CAplus.
Non-fullerene acceptor (NFA) end group (EG) functionalization, especially by fluorination, affects not only the energetics but also the morphol. of bulk-heterojunction (BHJ) organic solar cell (OSC) active layers, thereby influencing the power conversion efficiency (PCE) and other metrics of NFA-based OSCs. However, a quant. understanding of how varying the degrees of NFA fluorination influence the blend morphol. and photovoltaic properties remains elusive. Here a series of three A-DAD-A type NFAs (D = π-donor group and A = π-acceptor EG) which systematically increase the degree of EG fluorination and comprehensively investigate the resulting blends with the polymer donor PM6 in terms of optical properties, electronic structure, film crystallinity, charge carrier transport, and OSC performance is reported. The results indicate that the most highly fluorinated NFA, BT-BO-L4F, achieves an optimal BHJ hierarchical morphol. where enhanced NFA mol. intermol. π-π stacking and optimal vertical phase gradation are achieved in the BHJ blend. These factors also promote optimum NFA-cathode contact, more balanced electron and hole mobility, and suppress both monomol. and bimol. recombination. As a result, both the short-circuit c.d. and fill factor in this OSC series progressively increase with increasing EG fluorine d., and the resulting PCEs increase from 9 to 16.8%.
Advanced Energy Materials published new progress about 617-52-7. 617-52-7 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Aliphatic hydrocarbon chain,Ester, name is Dimethyl itaconate, and the molecular formula is C7H8BFO2, Name: Dimethyl itaconate.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics