研究目的
To investigate the influence of adding mesoporous Nb2O5 nanoparticle in different percentage of weight to TiO2 photoanode and to optimize the film thickness for improving the efficiency of dye-sensitized solar cells (DSSCs).
研究成果
The introduction of Nb2O5 nanoparticles to TiO2 photoanode significantly increases the short-circuit current density and efficiency of DSSCs. An optimal film thickness of 24 μm for TiO2/Nb2O5 nanocomposite electrode was found to provide the best performance, increasing the optimal film thickness from 15.2 μm observed with pure TiO2 electrodes.
研究不足
The study is limited by the technical constraints of DSSC technology, which currently only achieves half the efficiency of conventional solar cells. The optimization of film thickness and the percentage of Nb2O5 nanoparticles are critical for further improvements.
1：Experimental Design and Method Selection:
The study involved the synthesis of TiO2 nanoparticles using sol-gel technique and preparation of TiO2/Nb2O5 nanocomposites by adding mesoporous Nb2O5 nanoparticles in different weight percentages. The materials were characterized using UV-Vis absorption spectroscopy, XRD, and FESEM. DSSCs were fabricated and their photovoltaic performance was studied under simulated sunlight.
2：Sample Selection and Data Sources:
Titanium (IV) isopropoxide (TTIP), EtOH, Nitric acid (HNO3), mesoporous Niobium (V) oxide, and other materials were used for the preparation of nanoparticles and nanocomposites.
3：List of Experimental Equipment and Materials:
UV-VIS Spectrophotometer (UV-1700 Pharma Spec, SHIMADZU), X-ray diffractometer (Rigaku, MiniFlexII), Fe-SEM, Sun 2000 solar simulator, digital source meter (Keithley - 2440).
4：0).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The synthesis of TiO2 nanoparticles, preparation of TiO2/Nb2O5 nanocomposites, fabrication of DSSCs, and characterization of their photovoltaic performance.
5：Data Analysis Methods:
The efficiency of the assembled DSSCs was calculated using the equations provided in the paper.
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