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- W2956049205 abstract "Abstract In this research, we focused on the tuning of the absorption properties of acceptor materials based on naphthothiophene diimide (NTI) with a triad structures (NTI-π-NTI) by modifying the central π-unit. Novel NTI-based acceptors with a spirobifluorene (SF) unit (SF-NTIs) were designed and synthesized. Their absorption range (400–600 nm) were clearly different from that of previously reported acceptor with a NTI-indacenodithiophene-NTI structure (IDT-NTI, 650–800 nm). Although, the SF-NTI with the same solubilizing groups as IDT-NTI (2-ethylhexyl groups) is not soluble enough for solution processes and favorable molecular orientation properties for OSC devices, the 1-hexylheptyl substituted SF-NTI showed a good solubility and favorable “face-on” orientation in the active layer films. The fabricated OSCs showed power conversion efficiency as high as 5.2%, and excellent thermal stability. These results indicate that the absorption of the NTI-triads can be tuned by modifying the central π-unit and that their orientation nature and solubility can be controlled by altering the alkyl groups on the imide moieties. These properties allow us to develop efficient NTI-based acceptors with various absorption ranges." @default.
- W2956049205 created "2019-07-12" @default.
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- W2956049205 date "2019-12-01" @default.
- W2956049205 modified "2023-09-24" @default.
- W2956049205 title "Tuning the absorption range of naphthothiophene diimide-based acceptors for organic solar cells" @default.
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- W2956049205 doi "https://doi.org/10.1016/j.dyepig.2019.107691" @default.
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