ZnO/TiO_2复合纳米材料的制备及其在染料敏化太阳电池中的运用

Growth of ZnO/TiO_2 Nanostructured Composite Films and Its Application in Dye-Sensitized Solar Cells

本文在长有ZnO纳米粒子作为"种子层"的FTO基底上用水热合成法制备了取向高度一致的ZnO纳米线阵列,用TiCl4的异丙醇溶液在ZnO纳米线阵列的表面生长了纳米结构的TiO2。利用扫描电子显微镜、能量散射谱、X射线衍射分别表征纳米材料的形貌和结构,用Raman光谱研究了材料的晶格结构特性。染料敏化太阳电池的性能测试表明,与纯ZnO作为光阳极相比,ZnO/TiO2复合纳米材料作为光阳极的器件,开路电压和填充因子都得到了提高。

The highly-oriented ZnO nano-wire arrays were grown by hydrothermal synthesis on the fluorine-doped tin oxide glass substrates with the ZnO nano-particles pre-coated as seeds.Then,a nano-structured TiO2 layer was coated on each nano-wire of the array in solution of TiCl4 in isopropyl alcohol.The morphologies and microstructures of the ZnO/TiO2 nano-structured composite films were characterized with X-ray diffraction,scanning electron microscopy,energy dispersive spectroscopy and Raman spectroscopy.Its possible application in dye-sensitized solar cell was also studied.The results show that when it comes to photo-anode material,the ZnO/TiO2 nano-structured composite film outperforms the pure ZnO layers,with higher open-circuit voltage and fillfactor.