3D inverse opal (3D‐IO) oxides are very appealing nanostructures to be integrated into the photoelectrodes of dye‐sensitized solar cells (DSSCs). Due to their periodic interconnected pore network with a high pore volume fraction, they facilitate electrolyte infiltration and enhance light scattering. Nonetheless, preparing 3D‐IO structures directly on nonflat DSSC electrodes is challenging. Herein, 3D‐IO TiO₂ structures are prepared by templating with self‐assembled polymethyl methacrylate spheres on glass substrates, impregnation with a mixed TiO₂:SiO₂ precursor and calcination. The specific surface increases from 20.9 to 30.7 m² g⁻¹ after SiO₂ removal via etching, which leads to the formation of mesopores. The obtained nanostructures are scraped from the substrate, processed as a paste, and deposited on photoelectrodes containing a mesoporous TiO₂ layer. This procedure maintains locally the 3D‐IO order. When sensitized with the novel benzothiadiazole dye YKP‐88, DSSCs containing the modified photoelectrodes exhibit an efficiency of 10.35% versus 9.26% for the same devices with conventional photoelectrodes. Similarly, using the ruthenium dye N719 as sensitizer an efficiency increase from 5.31% to 6.23% is obtained. These improvements originate mainly from an increase in the photocurrent density, which is attributed to an enhanced dye loading obtained with the mesoporous 3D‐IO structures due to SiO₂ removal.

中文翻译：

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使用光电极中的局部有序反蛋白石纳米结构，可将有机染料敏化太阳能电池的效率提高超过10.3％

3D反蛋白石（3D-IO）氧化物是非常吸引人的纳米结构，可以集成到染料敏化太阳能电池（DSSC）的光电电极中。由于它们具有高孔体积分数的周期性互连孔网络，它们有助于电解质渗透并增强光散射。尽管如此，直接在不平坦的DSSC电极上制备3D-IO结构仍然具有挑战性。在此，通过在玻璃基板上用自组装的聚甲基丙烯酸甲酯球进行模板化，用TiO ₂：SiO ₂混合前体浸渍并煅烧来制备3D-IO TiO ₂结构。SiO ₂之后，比表面积从20.9增加到30.7 m ² g ^-1通过蚀刻去除，这导致中孔的形成。从基板刮下获得的纳米结构，将其加工成糊剂，并沉积在包含介孔TiO ₂层的光电极上。此过程在本地维护3D-IO顺序。当用新型苯并噻二唑染料YKP-88进行敏化时，含有修饰光电极的DSSC的效率为10.35％，而使用常规光电极的相同装置的效率为9.26％。类似地，使用钌染料N719作为敏化剂，可以将效率从5.31％提高到6.23％。这些改善主要源于光电流密度的增加，这归因于由于去除了SiO ₂而使中孔3D-IO结构获得的染料负载增加。