研究目的
To fabricate and characterize dye-sensitized solar cells (DSSC) using natural dyes extracted from Amaranthus red and Lawsonia inermis (Henna) leaves, aiming to find sensitizers that absorb light in the visible region for potential day-to-day applications.
研究成果
The study successfully fabricated DSSCs using natural dyes from Amaranthus red and Henna leaves, with the Amaranthus dye showing better performance (0.14% efficiency) than the Henna dye (0.09% efficiency). Despite lower efficiencies, the results are promising for future optimization and application.
研究不足
The fabricated DSSCs have lower efficiency than required for large-scale production. Potential areas for optimization include adding (–COOH) groups to the dyes and improving cell fabrication precision.
1：Experimental Design and Method Selection:
The study involved the extraction of natural dyes from Amaranthus red and Henna leaves using different solvents (distilled water, acetone, ethanol) and methods (crushing, boiling, drying). UV–Vis and FTIR spectroscopy were used to analyze the dyes. DSSCs were fabricated using TiO2-coated FTO substrates as photoanodes and graphene-coated FTO films as counter cathodes.
2：Sample Selection and Data Sources:
Leaves of Amaranthus red and Henna were used.
3：List of Experimental Equipment and Materials:
UV–Vis Spectrophotometer UV-2450, FT/IR-4600 type A, Keithley electrometer 6517B, Xenon lamp, FTO substrates, TiO2, graphene.
4：Experimental Procedures and Operational Workflow:
Dyes were extracted, characterized, and used to fabricate DSSCs. J–V characterization was performed to evaluate cell performance.
5：Data Analysis Methods:
UV–Vis and FTIR spectra were analyzed to determine absorption characteristics and functional groups. J–V curves were used to calculate fill factor and photoconversion efficiency.
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