| Dye-sensitized solar cells(DSSCs) are attracting both academic and industrial interest over the past decades due to their relatively high energy conversion efficiency and potential low-cost. Eectrolytes and porous titanium dioxide play an important role in DSSC. Recently, a certified record power conversion efficiency has been achieved for liquid electrolyte DSSCs. However, there are still some scientific and technological difficulties: evaporation and leakage of the organic liquid electrolyte must be overcome before the application of DSSCs.In this work, hydrophobic ionic organic plastic crystals and hydrophobic redox couple were used as water-resistant solid-state DSSCs. And in order to improve the filling of the light-scattering Ti O2 film with solid-state electrolyte, we report a facile and effective method for the preparation of light-scattering Ti O2 film with porous channels(or pores) via a salt template method. Main contents and conclusions contained two parts as follows:1. Hydrophobic redox hybrid redox couple: 1- cetyl-3-methyl imidazole salt / ionic liquid functionalized TEMPO([C16MIm I] / [Me Im-TEMPO] [TFSI]) was synthesized and characterized by NMR, DSC, TGA. The hydrophobic organic ion plastic crystals N, Nmethylethyl pyrrolidinium bis(trifluoromethylsulfonyl) imide salt(P12TFSI) was doped hydrophobic redox hybrid redox couple to prepare water-resistant solid-state elecctrolytes. And thermal, electrochemical properties, optical properties has been studied. Finally, the fabricated solid-state devices yielded an overall power conversion efficiency of about 5.16 % under AM 1.5 irradiance at 100 m W cm-2 at 65 oC, respectively. Furthermore, the unsealed DSSC showed good long-time stability at 100% relative humidity conditions at 50 oC.2. Ti O2 photoelectrodes with channels(or pores) were prepared via salt template and characterized by SEM. The formed channels(or pores) was used for the soild-state and qusi-solid-state DSSCs and enhanced the penetration degree of the solid-state and qusi-solid-state electrolytes into the porous Ti O2 photoelectrode. Finally, the photoelectric conversion efficiency of DSSCs based on solid electrolytes was increased from 3.89% to 4.73%, and the IPCE of DSSCS based on gel electrolyte increased from 5.91% to 6.61%. What is more, both of the cells showed good stability. |
