Influence of position of auxiliary acceptor in D–A–π–A photosensitizes on photovoltaic performances of dye-sensitized solar cells

摘要: Several novel indoline dyes configured with donor–acceptor–bridge–acceptor (D–A–π–A) structures were designed and applied to organic dye-sensitized solar cells. These D–A–π–A dye molecules are composed of (electron donating group), benzothiadiazole (BDT) (auxiliary acceptor), two furan rings (π-conjugated 2-cyanoacrylic acid accepting group). The influence position auxiliary acceptor in sensitizer on the performance photosensitize is investigated detail. Calculated results show that could achieve a red-shifted absorption long-wavelength region stronger short-wavelength when changes from donor acceptor. Moreover, among these dyes, WS-12, whose nearing acid, possesses better terms charge transfer characteristics, lifetime excited state as well vertical dipole moment compared WS-1 WS-11. We hope present provide theoretical guidance for designing photosensitizes higher efficiencies.