研究目的
Investigating the use of natural dye extracted from Peltophorum pterocarpum leaves as a light-harvesting material in dye-sensitized solar cells (DSSCs) to improve their performance and environmental friendliness.
研究成果
The study successfully demonstrated the use of natural dye from Peltophorum pterocarpum leaves as a sensitizer in DSSCs, achieving a power conversion efficiency of up to 7.17%. This approach offers an environmentally friendly alternative to synthetic dyes, with potential for further performance improvements.
研究不足
The performance of DSSCs using natural sensitizers is currently lower than those using synthetic dyes. The study suggests potential for improvement but does not address scalability or long-term stability of the natural dye-based DSSCs.
1：Experimental Design and Method Selection:
The study involved the synthesis of TiO2 nanoparticles via sol-gel method, extraction of natural dye from Peltophorum pterocarpum leaves using cold extraction with ethanol and water, and fabrication of DSSCs using these materials.
2：Sample Selection and Data Sources:
Leaves of Peltophorum pterocarpum were collected, cleaned, and shade-dried before dye extraction. TiO2 nanoparticles were synthesized from titanium isopropoxide.
3：List of Experimental Equipment and Materials:
UV-Vis spectrometer for dye absorption analysis, powder X-ray diffraction (PXRD) for structural analysis of TiO2 nanoparticles, high resolution scanning electron microscopy (HRSEM) for surface morphology analysis, Fluorine doped Tin Oxide (FTO) glass as substrate, and a doctor blade for TiO2 film coating.
4：Experimental Procedures and Operational Workflow:
TiO2 nanoparticles were synthesized, characterized, and used to fabricate DSSCs. The natural dye was extracted, characterized, and used to sensitize the TiO2 films. The DSSCs' performance was evaluated through J-V characteristic curves.
5：Data Analysis Methods:
The performance parameters of the DSSCs were calculated from the J-V curves, including power conversion efficiency, short circuit current density, open circuit voltage, and fill factor.
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