首先采用水热合成技术制备TiO2纳米线粉末,然后采用溶胶-凝胶技术制备钛酸丁酯溶胶,向溶胶中加入适量的TiO2纳米线制备凝胶浆体,采用浸渍提拉法在透明导电玻璃上制备TiO2纳米颗粒/TiO2纳米线复合薄膜的光阳极.通过XRD、SEM,电池的I-V特性和电化学阻抗谱测试,研究TiO2纳米线的添加量对光阳极的结构、形貌和电池性能的影响.结果表明,随着溶胶中TiO2纳米线添加量的增加,染料敏化太阳能电池的短路电流密度和光电转换效率显著提高,而开路电压和填充因子基本保持不变;复合光阳极中随着纳米线添加量的增加,电子的传输阻抗显著减少,电子的寿命延长.
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