研究目的
Investigating the development of an all-solid-state polymer electrolyte based on thiolate/disulfide redox couple for dye-sensitized solar cells (DSSCs) to achieve thermally stable photovoltaic performance.
研究成果
The study successfully developed a novel all-solid-state polymer electrolyte based on thiolate/disulfide redox couple for DSSCs, which showed thermally stable photovoltaic performance with PCE higher than 2% from 35 to 90 °C. The preservation of the lamellar nanostructure in the solid-state electrolyte was crucial for maintaining high charge transport ability and photovoltaic performance. This method offers a new strategy for efficient and stable all-solid-state DSSC preparation, especially for large-scale outdoor applications.
研究不足
The efficiency and Jsc of the qsDSSC were much lower than the reported thiolate/disulfide liquid crystal based DSSC due to the rigid mesogen in C5VimT unfavorable for the charge transport, which implied the necessity of molecular optimization of liquid crystal electrolyte precursor for highly efficient nanostructured solid-state electrolyte preparation.
1：Experimental Design and Method Selection:
The study involved the in-situ preparation of a lamellar-nanostructured polymer electrolyte from a smectic liquid crystal precursor. The methodology included the use of thiolate/disulfide redox couple for in-situ polymerization to preserve the lamellar nanostructure.
2：Sample Selection and Data Sources:
The electrolyte was prepared using C5VimT, T2, and NMBI with controlled molar ratios. The DSSCs were fabricated using a Z907 sensitized TiO2 photoanode and a carbon/PEDOT composite nanoparticle counter electrode.
3：List of Experimental Equipment and Materials:
Materials included C5VimT, T2, NMBI, chloroform/methanol, AIBN, and glass substrates. Equipment used for characterization included DSC, POM, SAXS, SEM, EDS, CV, and EIS.
4：Experimental Procedures and Operational Workflow:
The electrolyte was prepared by dissolving C5VimT, T2, and NMBI in chloroform/methanol, followed by solvent removal and in-situ thermal polymerization. DSSCs were fabricated by sandwiching the electrolyte between the photoanode and counter electrode, followed by in-situ polymerization.
5：Data Analysis Methods:
The charge transport properties were analyzed using CV and EIS measurements. The photovoltaic performance was evaluated using J-V measurements under simulated AM1.5G solar light.
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