研究目的
Investigating the sensitization effect of anthocyanin and chlorophyll dyes on optical and photovoltaic properties of zinc oxide based dye-sensitized solar cells.
研究成果
Anthocyanin sensitized ZnO based DSSC yield better photovoltaic performances compared to those of chlorophyll sensitized due to better anchoring with ZnO. Anthocyanin molecules are able to chemically adsorb into ZnO nanoparticles, whereas chlorophyll only forms weak physical bonds. The chemical structure of anthocyanin is smaller and more reactive compared to chlorophyll, leading to better performance.
研究不足
The study is limited to the comparison of anthocyanin and chlorophyll dyes as sensitizers for ZnO-based DSSCs. The research did not explore other natural dyes or their combinations.
1：Experimental Design and Method Selection:
The study involved the extraction of natural dyes from P. rubra flowers and S. androgynous leaves, fabrication of ZnO-based DSSCs, and their characterization.
2：Sample Selection and Data Sources:
Natural dyes were extracted from P. rubra flowers and S. androgynous leaves.
3：List of Experimental Equipment and Materials:
ITO glasses, ZnO nanopowders, lithium iodide, iodine, ethanol, and natural dyes.
4：Experimental Procedures and Operational Workflow:
Dye extraction, ZnO thin film fabrication, DSSC assembly, and characterization using UV-Vis spectroscopy, SEM, FTIR, and I-V measurement.
5：Data Analysis Methods:
Optical properties analysis, morphological study, and photovoltaic performance evaluation.
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UV-Vis spectrophotometer
Model Lambda 25 with UV Winlab V2.85 software
Perkin Elmer
Used to study the optical absorption of dyes and sensitized ZnO
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FTIR spectroscopy
IRTracer-100
SHIMADZU
Used to analyse the functional groups exist in the dyes and sensitized ZnO thin films
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ITO glasses
Transparent conductive oxide substrates for the base of photoanode and CE
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ZnO nanopowders
<100 nm
Sigma Aldrich
Used to absorb dye molecules
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Lithium iodide
99.9% trace metals basis
Sigma Aldrich
Used in a complex with iodine in the electrolyte of DSSCs
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Iodine
Fluka Analytical
Used in a complex with lithium iodide in the electrolyte of DSSCs
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Ethanol
95%
HmbG Chemicals
Used as solvent for dye extraction
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SEM
JEOUL JSM-6360 LA
Used to view the morphology of photoanodes
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Potentiostat
Autolab PGSTAT30
Eco Chemie B.V., The Netherlands
Used for I–V measurement
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