研究目的
Investigating the enhancement of photovoltaic performance in dye-sensitized solar cells (DSSCs) using TiO2 nanoparticles-decorated ZnO nanorod arrays (TNPs@ZNAs) as photoanodes, with a focus on the influence of bath temperature on the uniformity of TiO2 decoration and the resulting solar cell efficiency.
研究成果
The decoration of TiO2 nanoparticles on ZnO nanorod arrays (TNPs@ZNAs) significantly enhances the photovoltaic performance of dye-sensitized solar cells (DSSCs), with the highest power conversion efficiency (PCE) of 4.47% achieved at a bath temperature of 120 °C. This improvement is attributed to the enhanced dye adsorption, reduced electron–hole recombination, and improved charge transfer. The TNPs@ZNAs structure presents a promising route for the development of efficient DSSCs in optoelectronic applications.
研究不足
The study is limited to the hydrothermal and dip-coating methods for the preparation of ZNAs and TNPs@ZNAs, respectively. The influence of other synthesis parameters and the scalability of the process for industrial applications were not explored.
1：Experimental Design and Method Selection:
The study employed a hydrothermal process for the growth of vertically aligned ZnO nanorod arrays (ZNAs) on FTO substrates, followed by dip-coating to decorate TiO2 nanoparticles (TNPs) on the ZNAs. The influence of bath temperature on the decoration uniformity and photovoltaic performance was investigated.
2：Sample Selection and Data Sources:
FTO-coated glass substrates were used as the base for growing ZNAs and TNPs@ZNAs. The samples were characterized using FESEM, TEM, XRD, EDS, and UV–visible spectrophotometry.
3：List of Experimental Equipment and Materials:
Equipment included a field emission scanning electron microscopy (FESEM, SIGMA HV- Carl Zeiss), transmission electron microscopy (TEM, JEOL JEM-2100), energy-dispersive spectrometer (EDS, Bruker: 200-Z10), X-ray diffractometer (PANalytical), and UV–visible double-beam spectrophotometer (Hitachi UV-2700). Materials included zinc acetate dihydrate, zinc nitrate, hexamine, titanium tetra isopropoxide (TTIP), and N-719 dye.
4：0). Materials included zinc acetate dihydrate, zinc nitrate, hexamine, titanium tetra isopropoxide (TTIP), and N-719 dye.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: ZNAs were grown on FTO substrates via a hydrothermal method at various bath temperatures. TNPs were then decorated on ZNAs using a dip-coating method. The samples were annealed and characterized. DSSCs were fabricated using the prepared photoanodes, and their photovoltaic performances were evaluated.
5：Data Analysis Methods:
The photovoltaic performance parameters (VOC, JSC, FF, η) were calculated from J–V characteristics. The optical bandgap was determined using Tauc’s formula from UV–visible absorption spectra.
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