研究目的
Investigating the stability and degradation rate of natural green dye-based dye-sensitized solar cells (DSSC) under illumination.
研究成果
The research demonstrated that while open circuit voltage and fill factor of the cell increase with time, short circuit current decreases significantly, leading to degradation in cell efficiency. Proper packaging, UV filter, and UV stable electrolyte are suggested for further stability of the cell.
研究不足
The study highlights the low cell efficiency and stability of natural dye-based DSSCs, which limits their use. The presence of hydroxyl groups and UV exposure leads to chemical instability and decomposition of the electrolyte.
1：Experimental Design and Method Selection:
The study focused on the degradation mechanism of DSSC sensitized with natural green dye under illumination.
2：Sample Selection and Data Sources:
Natural green dye was extracted from spinach leaves using methanol.
3：List of Experimental Equipment and Materials:
TiO2 paste (18 NR-T from Sigma-Aldrich), FTO conducting glass substrate, methanol (
4：9% pure), graphite powder, Sodium Silicate, Iodine (I2), Potassium Iodide (KI), and ethylene glycol. Experimental Procedures and Operational Workflow:
TiO2 film preparation, dye extraction and absorption, cathode preparation, electrolyte preparation, and cell assembly.
5：Data Analysis Methods:
Measurement of cell efficiency and degradation rate over time under illumination.
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TiO2 paste
18 NR-T
Sigma-Aldrich
Used to prepare TiO2 film for the photoanode in DSSC.
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FTO conducting glass substrate
Used as the substrate for TiO2 film coating.
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methanol
Used as the solvent for extracting natural green dye from spinach leaves.
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graphite powder
Used to prepare the cathode paste.
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Sodium Silicate
Used to prepare the cathode paste.
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Iodine (I2)
Used to prepare the iodide electrolyte solution.
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Potassium Iodide (KI)
Used to prepare the iodide electrolyte solution.
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ethylene glycol
Used to prepare the iodide electrolyte solution.
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