研究目的
Investigating the performance of nanostructured metal oxides (ZnO and TiO2) based dye sensitized solar cells (DSSC) using natural dye extracted from fresh spinach leaves as a sensitizer.
研究成果
TiO2 based DSSC showed better performance (0.266% efficiency) compared to ZnO based DSSC (0.1312% efficiency) under the same simulated light conditions. The study demonstrates the potential of using natural dyes and nanostructured metal oxides for solar cell applications, with TiO2 being more efficient than ZnO in this context.
研究不足
The study is limited to the comparison of ZnO and TiO2 based DSSCs using a specific natural dye. The efficiency of the cells is relatively low compared to other studies, indicating potential areas for optimization in the synthesis and fabrication processes.
1：Experimental Design and Method Selection:
The study involved the synthesis of ZnO and TiO2 nanostructures using chemical bath deposition and sol-gel methods, respectively, for the fabrication of DSSCs.
2：Sample Selection and Data Sources:
Natural dye was extracted from fresh spinach leaves. ZnO and TiO2 nanostructures were characterized using FESEM and XRD.
3：List of Experimental Equipment and Materials:
FTO substrate, Zn(NO3)
4：6H2O, NH4OH solution, titanium isopropoxide, acetic acid, ethanol, spinach leaves, ultrasonic cleaner, centrifuge, solar simulator. Experimental Procedures and Operational Workflow:
ZnO was synthesized on FTO substrate by chemical bath deposition. TiO2 was synthesized using sol-gel method. Chlorophyll dye was extracted from spinach leaves. DSSCs were fabricated using the synthesized nanostructures and natural dye. Performance was evaluated under simulated light.
5：Data Analysis Methods:
The performance of DSSCs was evaluated in terms of short circuit current (Isc), open circuit voltage (Voc), fill-factor (FF), and power conversion efficiency (η).
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FTO substrate
Acting as a transparent conductive oxide glass substrate for the growth of ZnO and TiO2 nanostructures.
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Zn(NO3)2.6H2O
Used as a precursor for the synthesis of ZnO nanostructures.
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NH4OH solution
Used in the chemical bath deposition technique for the synthesis of ZnO nanostructures.
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titanium isopropoxide
Used as a precursor for the synthesis of TiO2 nanostructures.
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acetic acid
Used in the sol-gel method for the synthesis of TiO2 nanostructures.
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ethanol
Used as a solvent in the synthesis of TiO2 nanostructures.
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ultrasonic cleaner
Used for the extraction of chlorophyll dye from spinach leaves.
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centrifuge
Used for the segregation of the coloring of the samples during the extraction of chlorophyll dye.
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solar simulator
Used to study the performance of the fabricated DSSCs under simulated light conditions.
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