Novel ZnO-Based Film with Double Light-Scattering Layers as Photoelectrodes for Enhanced Efficiency in Dye-Sensitized Solar Cells†
Novel ZnO-Based Film with Double Light-Scattering Layers as Photoelectrodes for Enhanced Efficiency in Dye-Sensitized Solar Cells†
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DOI：
10.1021/cm901780z
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发表时间：
2010-02
影响因子：
8.6
通讯作者：
Yan‐Zhen Zheng;Xia Tao;Lixin Wang;Hui Xu;Q. Hou;Weilie Zhou;Jianfeng Chen
中科院分区：
文献类型：
--
作者：
Yan‐Zhen Zheng;Xia Tao;Lixin Wang;Hui Xu;Q. Hou;Weilie Zhou;Jianfeng Chen
制备了一种新型双光散射层 ZnO (DL-ZnO) 薄膜，该薄膜由 ZnO 单分散聚集体 (MA-ZnO) 作为底层和亚微米尺寸的板状 ZnO (SP-ZnO) 作为覆盖层组成，并作为染料敏化太阳能电池光阳极进行研究。研究发现，DL-ZnO 由于其相对较高的表面积和增强的光散射能力，可以显着提高染料敏化太阳能电池（DSSC）的效率。 DL-ZnO薄膜形成的总能量转换效率（η）为3.44%，比单独MA-ZnO形成的能量转换效率高47%，远大于单独SP-ZnO形成的能量转换效率（η = 0.81%）。此外，DL-ZnO 电池的 η 衰减测量表明，即使将 DL-ZnO 电池在环境温度下放置 100 小时，η 也没有发生显着下降。通过电化学阻抗谱（EIS）研究了电池的电荷复合行为，结果表明，在MA-ZnO、SP-ZnO和DL-ZnO基电池中，DL-ZnO基电池...
A novel double light-scattering-layer ZnO (DL-ZnO) film consisting of ZnO monodisperse aggregates (MA-ZnO) as underlayer and sub-micrometer-sized platelike ZnO (SP-ZnO) as overlayer was fabricated and studied as dye-sensitized solar-cell photoanodes. It was found that DL-ZnO could significantly improve the efficiency of dye-sensitized solar cells (DSSCs) owing to its relatively high surface area and enhanced light-scattering capability. The overall energy-conversion efficiency (η) of 3.44% was achieved by the formation of DL-ZnO film, which is 47% higher than that formed by MA-ZnO alone and far larger than that formed by SP-ZnO alone (η = 0.81%). Furthermore, the η decay measurements for DL-ZnO cell showed that no significant decrease of η occurred even when DL-ZnO cell was placed for 100 h at ambient temperature. The charge recombination behavior of cells was investigated by electrochemical impedance spectra (EIS), and the results showed that among MA-ZnO, SP-ZnO, and DL-ZnO based cells, DL-ZnO based cel...