This article concerns the use of anthocyanin, mallow and their mixture as a low-cost natural dyes to sensitize the photo-anodes of dye sensitized solar cells (DSSCs) based on titanium dioxide (TiO2) layers, and investing their effect on the electrical performance of the realized cells. In fact, different layers of porous titanium dioxide (TiO2) were deposited on fluorine-doped tin oxide glass (FTO) via the electrophoretic deposition (EPD) technique, and then sensitized with natural dyes to form the photo-anode electrode for the DSSC. Four DSSCs are manufactured: three cells, each one is formed by a TiO2 single layer and a cell formed by two TiO2 layers. An electric model, with five parameters based on of the Newton-Raphson algorithm (NR), was used to extract the electrical parameters of the cell and establish a comparative study between simulated and experimental current-voltage characteristic (J-V). An improvement of short-circuit current and efficiency was obtained for the DSSC with two layers of TiO2 and sensitized with the mixture of mallow and anthocyanin. Indeed, an increase of short circuit current from 0.34 to 1.98 mA/cm2 was observed and the efficiency reached 0.58%. This increase was more confirmed by external quantum efficiency (EQE). Nevertheless, after 96 hours under standard lighting at room temperature of 25 °C, a degradation of the efficiency of the cell with a rate value of 24% was noted.

中文翻译：

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使用天然敏化剂和电泳技术沉积的 TiO2 纳米颗粒的染料敏化太阳能电池的电学表征和效率增强


本文涉及使用花青素、锦葵及其混合物作为低成本天然染料来敏化基于二氧化钛 (TiO2) 层的染料敏化太阳能电池 (DSSC) 的光阳极，并研究它们对电性能的影响已实现的细胞。事实上，通过电泳沉积（EPD）技术在掺氟氧化锡玻璃（FTO）上沉积不同层的多孔二氧化钛（TiO2），然后用天然染料敏化以形成DSSC的光阳极电极。制造了四个 DSSC：三个电池，每个电池由单层 TiO2 形成，以及一个由两层 TiO2 层形成的电池。采用基于牛顿-拉夫森算法（NR）的五参数电模型提取电池的电参数，并建立模拟和实验电流电压特性（JV）的比较研究。具有两层 TiO2 并用锦葵和花青素混合物敏化的 DSSC 获得了短路电流和效率的改进。事实上，观察到短路电流从 0.34 mA/cm2 增加到 1.98 mA/cm2，效率达到 0.58%。外量子效率（EQE）进一步证实了这种增加。然而，在 25 °C 室温下标准照明下运行 96 小时后，注意到电池效率下降，速率值为 24%。