In this research investigation, natural dyes have been prepared from salvia and spathodea flowers for dye-sensitized solar cells (DSSCs). TiO2 nanosphere-based thin films were prepared using the doctor blade method and the natural dyes were loaded on TiO2 nanospheres. The electrochemical and photoelectrochemical properties were studied using electrochemical impedance spectroscopy and J–V measurement, respectively. This study has been used for device fabrication. The results show that the fabricated dye improves efficiency of solar cells. Electrochemical properties were studied under dark and light conditions and the optical properties of TiO2-based DSSCs were also studied. The efficiency of solar cells increases by using the fabricated natural dyes. As far as the advantage of using natural dyes is concerned, they can be beneficial for future bio-photovoltaic technology.

中文翻译：

---

用于TiO2基染料敏化太阳能电池（DSSCs）的丹参天然染料的制备及其在明暗条件下的电化学阻抗谱研究

在这项研究调查中，已经从丹参和金盏花花中制备了用于染料敏化太阳能电池 (DSSC) 的天然染料。使用刮刀法制备TiO2纳米球基薄膜，并将天然染料负载在TiO2纳米球上。分别使用电化学阻抗谱和 J-V 测量研究了电化学和光电化学性质。该研究已用于器件制造。结果表明，所制备的染料提高了太阳能电池的效率。在黑暗和光照条件下研究了电化学性质，并研究了基于 TiO2 的 DSSCs 的光学性质。通过使用制造的天然染料提高太阳能电池的效率。就使用天然染料的优势而言，