Titanium (Ti) has high potential in many practical applications such as biomedicine, architecture, aviation, and energy. In this study, we demonstrate an innovative application of dye-sensitized solar cells (DSSCs) based on Ti photoanodes that can be integrated into the roof engineering of large-scale architectures. A chromatic Ti foil produced by anodizing oxidation (coloring) technology is an attractive roof material for large-scale architecture, showing a colorful appearance due to the formation of a reflective TiO₂ thin layer on both surfaces of Ti. The DSSC is fabricated on the backside of the chromatic Ti foil using the Ti foil as the working electrode, and this roof–DSSC hybrid configuration can be designed as an energy harvesting device for indoor artificial lighting. Our results show that the facet-textured TiO₂ layer on the chromatic Ti foil not only improves the optical reflectance for better light utilization but also effectively suppresses the charge recombination for better electron collection. The power conversion efficiency of the roof–DSSC hybrid system is improved by 30–40% with a main contribution from an improvement of short-circuit current density under standard 1 sun and dim-light (600–1000 lx) illumination.

中文翻译：

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背面照射下用于染料敏化太阳能电池的彩色钛光电阳极

钛（Ti）在许多实际应用中具有很高的潜力，例如生物医学，建筑，航空和能源。在这项研究中，我们展示了基于钛光阳极的染料敏化太阳能电池（DSSC）的创新应用，可以将其集成到大型建筑的屋顶工程中。通过阳极氧化（着色）技术生产的彩色Ti箔是用于大型建筑的有吸引力的屋顶材料，由于形成了反射性TiO ₂而显示出彩色外观在钛的两个表面上形成一层薄的层。DSSC是使用Ti箔作为工作电极在彩色Ti箔的背面上制造的，这种屋顶-DSSC混合配置可设计为用于室内人造照明的能量收集设备。我们的结果表明，彩色Ti箔上的刻面纹理化TiO ₂层不仅可以提高光反射率，从而更好地利用光，而且可以有效地抑制电荷复合，从而更好地收集电子。车顶– DSSC混合动力系统的功率转换效率提高了30–40％，其主要贡献是在标准1阳光和暗光（600–1000 lx）照明条件下提高了短路电流密度。