TiO2 hierarchical nanostructures: Hydrothermal fabrication and application in dye-sensitized solar cells

TiO2 hierarchical nanostructures: Hydrothermal fabrication and application in dye-sensitized solar cells
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TiO2分级纳米结构:水热制备及其在染料敏化太阳能电池中的应用

DOI:
10.1063/1.4906988
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发表时间:
2015-01
期刊:
影响因子:
1.6
通讯作者:
Shi, Mingji
Shi, Mingji
中科院分区:
材料科学4区
文献类型:
--
作者:
Zhang, Gengmin;Yang, Jin;Sun, Wentao;Shi, Mingji

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水热法制备了由金红石纳米棒和树枝状纳米结构组成的TiO2分级纳米结构阵列,并将其用作染料敏化太阳能电池(DSSC)的光阳极。每个层次纳米结构阵列是在两个步骤中获得的。首先,在盐酸(HCl)和钛酸四丁酯(C16H36O4Ti)的水溶液中合成了一级纳米棒阵列;随后,在六氟钛酸铵((NH4)2TiF6)和硼酸(H3BO3)的水溶液中在纳米棒上生长二级分支。二次枝晶填充了一次金红石纳米棒之间的部分空间,并产生了更大的表面积。具有TiO2分级纳米结构作为光阳极的DSSC的光捕获能力明显提高,因为更多的染料分子可以负载在光阳极上,并且更多的光可以在DSSC内部散射。因此,用纳米TiO2光阳极代替初级TiO2光阳极,可使DSSC的光电转换效率提高一倍。
Arrays of TiO2 hierarchical nanostructures that consisted of rutile nanorods and anatase branches were hydrothermally fabricated and employed as photoanodes in dye-sensitized solar cells (DSSCs). Each hierarchical nanostructure array was attained in two steps. First, a primary nanorod array was synthesized in aqueous solutions of hydrochloric acid (HCl) and tetrabutyl titanate (C16H36O4Ti); subsequently, secondary branches were grown on the nanorods in aqueous solutions of ammonium hexafluorotitanate ((NH4)2TiF6) and boric acid (H3BO3). The secondary anatase branches filled part of the space among the primary rutile nanorods and gave rise to a larger surface area. Light-harvesting capability of the DSSCs with TiO2 hierarchical nanostructures as photoanodes was appreciably improved because more dye molecules could be loaded on the photoanodes and more light could be scattered inside the DSSCs. Therefore, the conversion efficiencies of the DSSCs were doubled by replacing the photoanode of primary TiO2 nanor...
基于高度有序TiO2纳米管阵列的柔性纤维型染料敏化太阳能电池
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