水热反应合成Li掺杂TiO_2纳米棒阵列的研究

Hydrothermal Synthesis of Li-doped TiO_2 Nanorod Arrays

本文利用水热法制备Li掺杂TiO2纳米棒阵列,采用场发射扫描电子显微镜(FESEM)和X射线衍射仪(XRD)分析Li掺杂对TiO2纳米棒阵列的形貌及结构影响,确定了最佳Li掺杂量为9%,并作为光阳极组装染料敏化太阳能电池,利用万能电子表测试电池的开路电压,当Li掺杂量为9%时,电池的开路电压最大为0.299V,较未掺杂提高59%。

In this paper, Li-doped TiO2 nanorod arrays were prepared by hydrothermal synthesis and characterized by field emission scanning electron microscopy （FESEM） and X-ray diffraction （XRD）. The effect of Li doping content on the morphology and structure of nanorods arrays was inverstigated. The dye-sensitized solar cells （DSSC） were assembled and the open circuit voltage was tested as well. The results showed that the optimum Li doping content is 8% with hydrothermal temperature of 180 ℃ and reaction time for 8h. The phase structure of Li-doped TiO2 nanorod arrays remains rutile, but the interplanar spacing decreases. The lattice defects suppress the recombination of electrons effectively. For DSSC with Li doping content of 9%, the maximum open circuit voltage is 0.299V, increased by 59% in contrast to that of undoped one.