In this work, six plants are presented to obtain different molecules with distinct properties to be used in dye-sensitized solar cells (DSSC). Cells have been assembled using (xoconostle), (limilla), (marigold flower), (poinsettia flower), (bougainvillea) and (green tea) as individual and mixed pigments. In the case of xoconostle and limilla this is the first time that their extracts have been used as sensitizers in DSSC. Having these natural dyes, the co-sensitization technique was adopted to improve the photovoltaic performance of the solar cells. The best performance with the individual extracts was from the poinsettia flower having a conversion efficiency of 0.0022 % with V of 0.29 V, J of 0.014 mA/cm and FF of 48.56, in the case of co-pigmentation, the best mixture was poinsettia flower with xoconostle and green tea (NXT) having a conversion efficiency of 0.0044 % with V of 0.34 V, J of 0.035 mA/cm and FF of 44.50, using irradiation of 1000 W/m at 25°C. The purpose of mixed dyes is to absorb a wider interval of the electromagnetic spectra. Computational calculations based on the Density Functional Theory were used to calculate each molecule’s HOMO and LUMO levels.

中文翻译：

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小叶漆树和仙人掌的天然提取物作为单敏化剂和共敏化剂，用于提高纳米 TiO2 基染料敏化太阳能电池的效率

在这项工作中，提出了六种植物来获得具有不同特性的不同分子，用于染料敏化太阳能电池（DSSC）。使用（xoconostle）、（limilla）、（万寿菊花）、（一品红花）、（九重葛）和（绿茶）作为单独和混合颜料组装细胞。就 xoconostle 和 limilla 而言，这是它们的提取物首次在 DSSC 中用作敏化剂。有了这些天然染料，采用共敏化技术来提高太阳能电池的光伏性能。各个提取物的最佳性能来自一品红花，其转换效率为 0.0022%，V 为 0.29 V，J 为 0.014 mA/cm，FF 为 48.56，在共着色的情况下，最佳混合物是一品红花xoconostle 和绿茶 (NXT) 的转换效率为 0.0044%，V 为 0.34 V，J 为 0.035 mA/cm，FF 为 44.50，在 25°C 下使用 1000 W/m 的辐射。混合染料的目的是吸收更宽范围的电磁光谱。基于密度泛函理论的计算被用来计算每个分子的 HOMO 和 LUMO 能级。