中文摘要：

采用水热法制备TiO_2和ZnO/TiO_2复合粉体,将不同Zn^2＋/Ti^（4＋）摩尔比制备的ZnO/TiO_2复合粉制备浆料,采用刮涂法在掺氟的SnO_2透明导电玻璃（FTO）上制备ZnO/TiO_2复合光阳极薄膜,与Pt对电极和电解质组装成染料敏化太阳能电池。采用X射线衍射仪（XRD）和扫描电镜（SEM）对所制备样品的物相组成和形貌进行表征,通过光电性能和电化学阻抗谱测试,研究Zn^2＋/Ti^（4＋）摩尔比对ZnO/TiO_2复合光阳极电池性能的影响。结果表明：基于纯TiO_2的DSSC的短路电流密度Jsc为1.77 mA/cm^2,光电装换效率为0.90%;当Zn^2＋/Ti^（4＋）摩尔比为1：1时,ZnO/TiO_2粉体制备的DSSC短路电流密度Jsc和光电转换效率达到最大,分别为2.88 mA/cm^2和1.26%,比纯TiO_2的转换效率提高了40%。

英文摘要：

TiO_2 and ZnO/TiO_2 nanopowders were prepared by hydrothermal method.The ZnO/TiO_2 composite photoanodes with different Zn~（2＋）/Ti~（4＋） molar ratios were prepared on the transparent conductive fluorine-doped SnO_2（FTO）substrates by doctor-blade method.These photoanodes were assembled into dye-sensitized solar cells（DSSCs）together with Pt-counter electrode and liquid electrolyte.XRD and SEM were used to characterize the phase composition and morphology of the synthesized samples.Results showed that the Jsc and Eff of the DSSC based on the pure TiO_2 photoanode were 1.77 m A/cm~2 and 0.9 %,respectively.The Jsc and Eff of the DSSC fabricated from ZnO/TiO_2 powder with the Zn~（2＋）/Ti~（4＋） ratio of 1：1 were optimum,which were 2.88 m A/cm~2 and 1.26%.The Eff was 40 % higher than that of pure TiO_2 based DSSC.