研究目的
Investigating the transformation of a liquid electrolyte to a gel inside dye-sensitized solar cells for better stability and performance.
研究成果
The use of a MOF-based gel electrolyte in DSSCs improves both performance and stability under thermal stress. The gel electrolyte ensures good interfacial contact with the TiO2 photoanode, leading to slightly higher efficiency compared to liquid electrolyte-based cells. The study demonstrates the potential of this method and material for commercializing DSSCs and other energy-related applications.
研究不足
The study focuses on the use of a specific MOF-based gel electrolyte in DSSCs, which may not be directly applicable to other types of solar cells. The long-term stability under conditions other than thermal stress at 60 °C was not investigated.
1：Experimental Design and Method Selection
The study involved the preparation of a gel electrolyte based on a metal-organic framework (MOF) for use in dye-sensitized solar cells (DSSCs). The electrolyte was designed to gelate inside the solar cell to ensure optimal interfacial connection between the TiO2 photoanode and electrolyte ingredients.
2：Sample Selection and Data Sources
Fluorine-doped SnO2 conducting glass (FTO glass) was used as the substrate for the photoanode. The electrolyte was prepared using a conventional liquid electrolyte mixed with an Al3+ based MOF network.
3：List of Experimental Equipment and Materials
FTO glass (Pilkington, TEC 8, 2.3 mm), TiO2 paste (ENB Korea), Ruthenium dye (N719), Pt paste (Dyesol), Al(NO3)3?9H2O, trimesic acid, BMII (1-butyl-3-methylimidazolium iodide), I2, LiI, t-BP, NaSCN, MPN.
4：Experimental Procedures and Operational Workflow
The TiO2 paste was printed onto cleaned FTO glass and sintered. The dye was adsorbed onto the TiO2 film. The electrolyte was prepared and injected into the DSSCs in liquid form, which then gelated inside the cells. The photovoltaic performance was characterized under simulated sunlight.
5：Data Analysis Methods
Photocurrent-voltage characteristics were measured using a digital source meter and solar simulator. The morphology and thickness of the TiO2 films were analyzed by SEM. Energy dispersive X-ray spectrometry (EDS) mapping was used to check the penetration of the gel into the TiO2 layer.
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