Abstract: Two new electron donate-withdraw structured porphyrin dyes(WP-1 and WP-2) with bis(9,9-dihexyl-9H-fluoren-2-yl)amine as an electron donor were designed and synthesized. The structures of the two dyes were characterized by proton nuclear magnetic resonance and high resolution mass spectra technologies. The UV-visible absorption spectra of the two dyes were tested. Dye-sensitized solar cells(DSSCs) using the two dyes gave high power conversion efficiencies of 4.01% and 7.07% under 100×10-3 W/cm2 illumination, respectively. The sealed DSSCs sensitized with dye WP-2 could keep more than 98% of the initial efficiency under natural sunlight irradiation for 500 h, which illustrated that the bis(9,9-dihexyl-9H-fluoren-2-yl)amine is suitable in the electron donate-withdraw structured porphyrin dyes as an electron donor. This not only enriched the types of electron donors, but also built the foundation for further research on bisfluorenamine derivative as electron donor in porphyrin dyes.

Key words: porphyrin dye, dye-sensitized solar cells, electron donor, bis(dihexyl-9H-fluoren-yl)amine