经酸化处理的多壁碳纳米管( MWCNTs)与纳米石墨复合后沉积在FTO导电玻璃基底上制备出染料敏华太阳能电池薄膜对电极. 利用SEM﹑TEM﹑EDS与IR光谱对其进行表征. 以MgO掺杂的TiO2 薄膜为光阳极对电池通过循环伏安法( CV曲线)﹑电化学阻抗谱( EIS)和伏安特性曲线( J-V)进行光电性能分析. 结果表明:酸化处理的MWCNTs与纳米石墨复合对电极展现出优异的光催化性能,有利于电池光电性能的提高. 电池开路电压及短路电流密度分别可达 0. 53 V﹑4. 67 mA/cm2 ,其光电转换效率达到4. 10%,与铂对电极的性能相当.
A counter-electrode ( CE) for dye-sensitized solar cells ( DSSCs) was prepared by coating a slurry containing acid-oxi-dized multi-wall carbon nanotubes and nano-graphite powder onto a fluorine-doped tin oxide conducting glass substrate. The samples were characterized by SEM, TEM, EDS and IR spectroscopy. The CE performance in the DSSCs with MgO-doped TiO2 as the pho-toanode was investigated by measurements of current-voltage curves, cyclic voltammetry and electrochemical impedance spectrosco-py. Results show that the cell with the CE exhibits the best photoelectric properties of all the carbon-based CEs investigated. The short-circuit current density (Jsc) is 4. 67 mA/cm2, the open-circuit voltage (Voc) is 0. 53 V and photoelectric conversion efficiency is up to 4. 10%, which are comparable with those of the Pt-based CE in DSSCs.
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