双层结构CeO2光阳极在染料敏化太阳能电池中的应用

利用水热法合成核壳结构Au@SiO₂@CeO₂纳米微球，制备了一系列双层结构复合光阳极并应用于染料敏化太阳能电池(DSSC)。研究表明：当CeO₂纳米微球和核壳结构Au@SiO₂@CeO₂纳米微球应用于DSSC光阳极散射层时，电池的光电转化效率有了显著提高。相对于纯 TiO₂ (P25)光阳极，P25/CeO₂纳米球光阳极电池的 DSSC 光电性能提高了 15.3%，P25/Au@SiO₂@CeO₂纳米球光阳极电池的光电性能提高了27.9%。DSSC光电性能的提高主要归因于2个方面：一方面，Au纳米粒子的表面等离子体共振效应有效提高了光阳极薄膜的光散射效应。另一方面，CeO₂具有较高的染料负载能力，核壳球形结构具有较高的比表面积，增强了光的散射效应，提高了电子传输能力。

Application of bilayer-structured CeO2 photoande in dye-sensitized solar cells

Different composite photoanodes with double-layer structure applied to dye-sensitized solar cell (DSSC) can be prepared by core shell structure Au@SiO₂@CeO₂ nanospheres synthesized by hydrothermal method. The results showed that the photoelectric conversion efficiency of the solar cells could be significantly improved when CeO₂ nanospheres and Au@SiO₂@CeO₂ nanospheres coating were applied to the photoanode scattering layer of DSSC. Compared with the pure TiO₂ (P25) photoanode, the photoelectric property of P25/CeO₂ nanosphere photoanode cells increased by 15.3%, and that of P25/Au@SiO₂@CeO₂ nanosphere photoanode cells increased by 27.9%. Why the photoelectric property of DSSC can be enhanced is mainly attributed to the following two dimensions. On the one hand, the light scattering effect of the photoanode film is effectively heightened by the localized plasmon resonance of the Au nanoparticles. On the other hand, the light scattering effect and the electron transmission capacity are enhanced since the CeO₂ has the high load capacity in the dye, the core-shell structure with a high specific surface area.