中文摘要：

采用水辅助化学气相沉积法制备了结晶性好的一维带状SnO2．分别以小粒径锡粉和金修饰的小粒径锡粉作为反应原料制得带宽度不同的带状SnO：，小粒径锡粉作为反应原料能提高带状SnO2的产率．将所得Sn02带和SnO2纳米颗粒按不同比例混合配制成胶体，采用刮涂法制备含不同比例纳米颗粒和纳米带的复合SnO2薄膜并组装染料敏化太阳能电池（DSSCs）来评价带状SnO2的电子输运性能．组装的太阳能电池表现出与复合纳晶薄膜中一维SnO2带的带宽度和所含比例密切相关的光电性能．通过强度调制光电流谱的测量确定复合SnO2薄膜的电子传输速率，并进一步分析一维材料所具有的良好电子传输性能对光电流增加的贡献．因为一维SnO2带在复合纳晶薄膜中作为电子输运的快速通道可以加快电子的输运速度。所以以适宜的比例添加具有合适宽度的一维SnO2带可以明显提高太阳能电池的光电性能．

英文摘要：

Well-crystallized one-dimensional （1D） structural SnO2 belts are synthesized using a simple water-assisted chemical vapor deposition method. To increase the yield of SnO2 belts, small Sn particles with and without Au-modiflcations are used as source materials to grow different width SnO2 belts. Dye-sensitized solar cells （DSSCs） fabricated using the composite （nanoparticle/nanobelt） SnO2 thin films, are used to evaluate the electron transport properties of the SnO2 belts. Pastes containing different ratios of nanoparticles and belts are used to prepare the composite film by the doctor-blade method. The DSSCs exhibit different photovoltaic performances which are dependent on the nanoparticle/nanobelt ratio and width of the Sn02 belts in the thin film. The enhanced electron transport properties of the composite films containing the SnO2 belts is evaluated using intensity modulated photocurrent spectroscopy （IMPS）. 1D SnO2 belts with a particular belt width improve the photovoltaic performance by providing electron paths to accelerate electron transport in the composite nanocrystalline thin films.