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为了提高染料敏化太阳能电池(DSSC)的光电转化效率,以聚苯乙烯微球(290-300 nm)自组装形成的胶体晶体为牺牲模板制备了三维有序氧化钛中空球(3DOHS-Ti O2)薄膜材料,考察了以P25-Ti O2/3DOHS-Ti O2双层膜为光阳极的电池的光电转化特性。扫描电镜结果表明:3DOHS-Ti O2样品中的Ti O2中空球呈紧密六方排列,其球心距为260-270 nm,壁厚为40-50 nm,相邻的Ti O2中空球彼此之间通过孔洞相互连接;透射电镜结果表明:Ti O2中空球体由尺寸约为10 nm的锐钛矿相氧化钛颗粒组成,其壳壁上有由颗粒间堆积形成的介孔。光电性能测试结果表明:P25-Ti O2/3DOHS-Ti O2/DSSC的光电转化效率可达6.98%,明显优于常规的P25-Ti O2/DSSC(4.32%),其原因是双层膜光阳极中的3DOHS-Ti O2薄膜对太阳光散射和捕捉能力的增强。
In order to improve the photoelectric conversion efficiency of dye-sensitized solar cells (DSSCs), three-dimensionally ordered titanium oxide hollow spheres (3DOHS-Ti O2 ) Thin film materials, investigated the photoelectric conversion characteristics of the battery with P25-Ti O2 / 3DOHS-Ti O2 bilayer as a photoanode. Scanning electron microscopy results show that the Ti O2 hollow spheres in the 3DOHS-Ti O2 sample are arranged in a closely hexagonal arrangement with a sphere center distance of 260-270 nm and a wall thickness of 40-50 nm. The adjacent Ti O2 hollow spheres pass each other The results of transmission electron microscopy showed that the Ti O2 hollow spheres consisted of anatase phase titanium oxide particles with a size of about 10 nm and had mesopores formed on the shell wall by accumulation of particles. The results of photoelectric test show that the photoelectric conversion efficiency of P25-Ti O2 / 3DOHS-Ti O2 / DSSC can reach 6.98%, which is obviously superior to the conventional P25-Ti O2 / DSSC (4.32% In the 3DOHS-Ti O2 film on the sun light scattering and capture capabilities.