Dye-sensitized solar cells based on hollow anatase TiO2 spheres prepared by self-transformation method

Dye-sensitized solar cells based on hollow anatase TiO2 spheres prepared by self-transformation method
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自转变法制备的基于锐钛矿型TiO2空心球的染料敏化太阳能电池

DOI:
10.1016/j.electacta.2009.09.021
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发表时间:
2010
影响因子:
6.6
通讯作者:
Yu, Jiaguo*
Yu, Jiaguo*
中科院分区:
材料科学2区
文献类型:
--
作者:
Fan, Jiajie;Zhao, Li;Yu, Jiaguo*

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染料敏化太阳能电池(DSSC)是基于以尿素为碱催化剂的化学诱导自转化(CIST)策略合成的中空纳米TiO 2(HA-TiO 2)球而制备的,其壁由纳米TiO 2晶体组成,具有分级多孔性。TiO 2中空结构材料不仅具有低密度、高比表面积和多级多孔结构,而且具有高的光收集效率和载流子的快速运动。讨论了煅烧温度对HA-TiO 2太阳电池性能的影响。随着煅烧温度的升高,光电转换效率(η)增加。在600°C时,HA-TiO 2电池达到最高效率。HA-TiO 2电池的性能也与相同膜厚的Degussa P-25(P25)TiO 2纳米颗粒电池进行了比较,它们在600°C下的最佳效率分别为4.82%和4.35%。HA-TiO 2电池的性能增强是由于其高的表面积和分级的纳米多孔结构相比,无孔TiO 2纳米粒子(P25)。
Dye-sensitized solar cells (DSSCs) are fabricated based on hollow anatase TiO2(HA-TiO2) spheres synthesized by a chemically induced self-transformation (CIST) strategy using urea as a base catalyst, whose walls are composed of anatase nanocrystals and exhibit hierarchical porosity. TiO2hollow structured materials not only have low density, high specific surface areas, and hierarchically porous structures, but also exhibit high light-collection efficiency and fast motion of charge carriers. Effects of calcination temperatures on the performance of HA-TiO2solar cells are investigated and discussed. With increasing calcination temperatures, the light–electricity conversion efficiencies (η) increase. At 600°C, HA-TiO2cells reach the highest efficiency. The performances of HA-TiO2cells are also compared with Degussa P-25 (P25) TiO2nanoparticle cells at the same film thickness, and their optimal efficiencies at 600°C are 4.82 and 4.35%, respectively. The enhanced performance of HA-TiO2cells is due to their high surface area and hierarchically nanoporous structures when compared with the nonporous TiO2nanoparticles (P25).
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