研究目的
To investigate the substrate diameter-dependent photovoltaic performance of flexible fiber-type dye-sensitized solar cells with TiO2 nanoparticle/TiO2 nanotube array photoanodes.
研究成果
The study successfully optimized the fabrication of TNP/TNA photoanodes for FDSSCs, achieving a highest η of 3.31%. The influence of Ti wire diameter on FDSSC performance was elucidated, with thicker wires yielding better performance due to thinner electrolyte layers. Flexible FDSSCs demonstrated good stability under bending, with 84% photocurrent retention after 10 bends. This work provides insights into the assembly of efficient photoanodes with composite TiO2 structures for FDSSCs.
研究不足
The photon-to-electricity conversion efficiency (η) achieved in this work is smaller than those reported in previous literature, likely due to the configuration of the cell assembly. Future work will explore different configurations of FDSSC to understand the effects of the shape and relative positions of photoanode and counter electrode on photovoltaic performance.
1:Experimental Design and Method Selection:
The study involved the anodization technique for growing TiO2 nanotube arrays (TNA) on Ti wires and the dip-coating technique for depositing TiO2 nanoparticles (TNP) on TNA. The effects of anodization voltage and time, as well as dip-coating rate, were investigated to optimize the photoanode performance.
2:Sample Selection and Data Sources:
Ti wires with diameters of
3:5 and 127 mm were used as substrates. The electrolyte for anodization contained 3 wt % NH4F and 8 wt % H2O in ethylene glycol. List of Experimental Equipment and Materials:
Equipment included a power supply (MP-310, major science), potentiostat/galvanostat instrument with an FRA2 module (PGSTAT 204, Autolab), and a solar simulator (X500, BLUE SKY). Materials included Ti wires, NH4F, ethylene glycol, TiO2 (P25), and N719 dye.
4:Experimental Procedures and Operational Workflow:
Ti wires were anodized at different voltages and times, followed by annealing. TNP was deposited on TNA using dip-coating at varying rates. FDSSCs were assembled using the prepared photoanodes and Pt wire counter electrodes.
5:Data Analysis Methods:
Photovoltaic performance was evaluated using photocurrent density-voltage (J-V) curves and electrochemical impedance spectroscopy (EIS).
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