本文报道了一种基于二氧化钛(TiO2)纳米管的染料敏化太阳能电池.用二次阳极氧化法在钛箔上生长出高度有序的TiO2纳米管薄膜,然后将完整剥落的纳米管薄膜结合TiO2纳米颗粒的浆料转移到掺杂氟的SnO2透明导电玻璃(FTO)基底上,从而获得一种特殊的染料敏化光阳极.对比了不同长度的TiO2纳米管的电池性能,发现经TiC14处理长度为32.8 μm的TiO2纳米管对应的电池表现较好的光电转换效率,达到4.15％.通过X射线衍射分析了高温退火对纳米管晶化结构的影响.电化学阻抗谱分析表明:光电子传输对光阳极纳米管层厚依赖性强,随着纳米管长度的增长,界面电阻呈明显的减小,这一结果对于理解和进一步改善染料敏化电池光阳极内部电子输运过程具有重要意义.
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