中文摘要：

为了研究不同（Au@SiO2和TiO2）质量比的Au@SiO2的掺杂对染料敏化太阳能电池（DSSC）性能的影响,用机械球磨法制备了一系列基于不同掺杂含量的纳米晶核壳结构Au@SiO2的电池光阳极材料.研究结果表明,Au@SiO2的引入使得吸附在光阳极上的染料的光吸收增强,并显著提高了电池的短路电流密度J（sc）和光电转换效率η.当m（Au@SiO2）∶m（TiO2）为0.3%时对应的电池具有最优的性能,其短路电流密度J（sc）为15.5 mA·cm^-2,开路电压V（oc）为686mV,光电转换效率达到6.49%,比纯的TiO2光阳极电池的效率提高了17.5%.研究发现,电池性能的提高可归因于两方面：1）壳内Au纳米颗粒所具有的局域表面等离子体共振（LSPR）效应,使光阳极上染料的光吸收增强;2）SiO2外壳层对暗电流的有效抑制.

英文摘要：

In order to study the different mass ratio（m（Au@SiO2 ） ： m（ TiO2 ）） of Au@SiOzdoping effect on the performance of dye sensitized solar cell（DSSC）, a series of composite photoanode materials with different amounts of core-shell structure nano-Au@SiO2 are prepared by mechanical ball grinding. Studies revealed that, by introducing the Au@SiO2, the intensity of the light absorption spectra of the dye loaded on surface of photoanode, the short-circuit current density （Jsc） and the photoelectric conversion efficiency （η） of the dyesensitized solar cell are greatly increased. The optimal properties were obtained in the 0.3 % Au@SiO2 doped DSSC with a maximum Jsc of 15.5 mA · cm^-2 ,a highest open-circuit voltage of 686 mV and a best photoelectric conversion efficiency of 6.49%, giving 17.5% higher than the η of the conventional pure TiO2 based DSSC. The improved performance of the optimal DSSC is attributed to two aspects：l） the localized surface plasmon resonance of the Au nanoparticles, which increases the light absorption of the dye load on photoanode;2） the effective restraint of SiO2 on the dark-current.