Structural parameters controlling the performance of organized mesoporous TiO2 films in dye sensitized solar cells
Structural parameters controlling the performance of organized mesoporous TiO2 films in dye sensitized solar cells
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DOI：
10.1016/j.ica.2007.05.012
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发表时间：
2008-02
影响因子：
2.8
通讯作者：
M. Zukalová;J. Procházka;A. Zukal;Jun‐Ho Yum;L. Kavan
中科院分区：
文献类型：
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作者：
M. Zukalová;J. Procházka;A. Zukal;Jun‐Ho Yum;L. Kavan
研究了具有有序介孔结构的二氧化钛薄膜作为染料敏化太阳能电池的光阳极。通过使用两亲性三嵌段共聚物Pluronic P123实施超分子模板协议，在FTO载体上生长了高质量的薄膜。通过重复浸渍镀膜和焙烧循环可获得更厚的薄膜，最多10层。制得的二氧化钛薄膜无裂纹，光学透明，厚度超过2μm，同时保持了有序的介孔形态。由Kr-吸附等温线测定，它们的粗糙度因子超过500。N-3和N-719染料的表面覆盖率为0.31分子/nm2，约为(101)锐钛矿面理想染料负载量的三分之一。N-945染料敏化的多层膜的太阳性能在1-3层膜上呈线性变化，但在较厚膜上接近平台期。
Titanium dioxide films with organized mesoporous structure were investigated as photoanodes in dye sensitized solar cells. High-quality films were grown on FTO supports by implementing the protocol of supramolecular templating with an amphiphilic triblock copolymer, Pluronic P123. Thicker films were obtained by repeated dip-coating and calcination cycles of up to 10 layers. The TiO2films were crack-free, optically transparent, and had thicknesses exceeding 2μm, while still preserving the organized mesoporous morphology. Their roughness factors, determined from Kr-adsorption isotherms, exceeded 500. The sorption of N-3 and N-719 dyes was fitted to a surface coverage of 0.31molecules/nm2, which is about one third of the ideal dye loading assumed for the (101) anatase face. The solar performance of multilayer films sensitized with N-945 dye scaled linearly for 1–3 layer films, but approached a plateau for thicker films.