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首页> 外文期刊>Journal of Electronic Materials >Photovoltaic Characterization and Electrochemical Impedance Spectroscopy Analysis of Dye-Sensitized Solar Cells Based on Composite TiO_2-MWCNT Photoelectrodes
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Photovoltaic Characterization and Electrochemical Impedance Spectroscopy Analysis of Dye-Sensitized Solar Cells Based on Composite TiO_2-MWCNT Photoelectrodes

机译：复合TiO_2-MWCNT光电极对染料敏化太阳能电池的光伏表征及电化学阻抗谱分析

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摘要

Dye-sensitized solar cells (DSSCs) use the effect of light on dye molecules to generate electricity through a photoelectrochemical mechanism. The aim of this study is to synthesize nanostructured DSSCs based on titania-multi-walled carbon nanotube (TiO_2-MWCNT) composite photoelectrodes and improve their performance and efficiency. DSSCs were fabricated based on single-layer TiO_2-MWCNT photoelectrodes with various weight percentages of multiwalled carbon nanotubes and bilayer TiO_2/TiO_2-2%MWCNT photo-electrodes. The microstructure and thickness of the anodic layers were characterized by field-emission scanning electron microscopy and optical microscopy. Also, to compare the conversion efficiency and determine the electron behavior in the electrical equivalent circuit of these cells, photovoltaic characterization and electrochemical impedance spectroscopy (EIS) analysis were used. The DSSC based on a single-layer TiO_2-2%MWCNT electrode, compared with other single-layer DSSCs in this study, had the highest conversion efficiency of 3.9% (for anodic layer thickness of 9 μm). The efficiency of the solar cell with the bilayer TiO_2/TiO_2-2%MWCNT photoelectrode, in comparison with the single-layer solar cell with the TiO_2-2%MWCNT electrode, showed a 23% increase from 4.33% to 5.35% (for anodic layer thickness of 18 μm). EIS analysis indicated that the charge-transport resistance of the DSSC based on the bilayer photoelectrode, in comparison with the single-layer TiO_2 and TiO_2-2%MWCNT solar cells, was decreased by 68% and 57%, respectively.
机译：染料敏化太阳能电池（DSSC）利用光对染料分子的作用通过光电化学机制产生电能。这项研究的目的是合成基于二氧化钛-多壁碳纳米管（TiO_2-MWCNT）复合光电电极的纳米结构DSSC，并提高其性能和效率。 DSSCs是基于具有不同重量百分比的多壁碳纳米管的单层TiO_2-MWCNT光电极和双层TiO_2 / TiO_2-2％MWCNT光电极制备的。通过场发射扫描电子显微镜和光学显微镜表征了阳极层的微观结构和厚度。此外，为了比较转换效率并确定这些电池的等效电路中的电子行为，使用了光伏特性分析和电化学阻抗谱（EIS）分析。与本研究中的其他单层DSSC相比，基于单层TiO_2-2％MWCNT电极的DSSC具有3.9％的最高转换效率（阳极层厚度为9μm）。与具有TiO_2-2％MWCNT电极的单层太阳能电池相比，具有TiO_2 / TiO_2-2％MWCNT双层电极的太阳能电池的效率从23％提高到23％，从4.33％提高到5.35％（阳极）层厚度为18μm）。 EIS分析表明，与单层TiO_2和TiO_2-2％MWCNT太阳能电池相比，基于双层光电极的DSSC的电荷传输电阻分别降低了68％和57％。

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