Abstract Dye sensitized solar cells (DSSCs) are the third generation photovoltaics that convert solar radiation into electricity. DSSCs have been widely studied due to their low cost and ease of fabrication. In this study, TiO2 photoanodes have been sensitized with organic dyes RhB and D149 and their performance was compared with conventional N719 sensitized photoanode. Further, the consequences of addition of chenodeoxycholic acid (CDA) on the performance of DSSCs sensitized with RhB, D149 and N719 dyes were analyzed. The photoanodes were characterized using FESEM, EDXs and XRD techniques. To reduce the cost of DSSCs, Graphite from HB pencil along with PEDOT:PSS (Gr-PEDOT) was used as catalytic material instead of expensive platinum in counter electrode. The electrocatalytic activity of prepared counter electrode was investigated by cyclic voltammetry. The performance of DSSCs was investigated by I-V characteristic measurement and Electrochemical Impedance Spectroscopy. The photo conversion efficiency of RhB, D149 and N719 sensitized DSSCs were found to be 1.42%, 6.67% and 6.34% respectively. At optimized condition, the addition of CDA in dye solution remarkably increased the performance of RhB, D149 and N719 sensitized DSSCs by 23.24%, 15.74% and 10.41% respectively. The electrochemical impedance spectroscopy has been analyzed in terms of Nyquist plot and an equivalent circuit has been modelled to find out series resistance, resistance due to redox reaction at counter electrode and charge transfer resistance at TiO2/dye/electrolyte interface.

中文翻译：

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鹅去氧胆酸作为共添加剂在提高 DSSCs 效率中的作用

摘要 染料敏化太阳能电池（DSSCs）是第三代将太阳辐射转化为电能的光伏电池。DSSCs 因其低成本和易于制造而被广泛研究。在这项研究中，TiO2 光阳极用有机染料 RhB 和 D149 敏化，并将它们的性能与传统的 N719 敏化光阳极进行了比较。此外，还分析了添加鹅去氧胆酸 (CDA) 对用 RhB、D149 和 N719 染料敏化的 DSSC 性能的影响。使用FESEM、EDX和XRD技术表征光阳极。为了降低 DSSC 的成本，HB 铅笔中的石墨与 PEDOT:PSS (Gr-PEDOT) 一起用作催化材料，而不是对电极中昂贵的铂。通过循环伏安法研究了制备的对电极的电催化活性。通过IV特性测量和电化学阻抗谱研究了DSSCs的性能。RhB、D149 和 N719 敏化 DSSC 的光转换效率分别为 1.42%、6.67% 和 6.34%。在优化条件下，染料溶液中CDA的加入显着提高了RhB、D149和N719敏化DSSCs的性能，分别提高了23.24%、15.74%和10.41%。根据奈奎斯特图分析了电化学阻抗谱，并模拟了等效电路以找出串联电阻、对电极氧化还原反应引起的电阻和 TiO2/染料/电解质界面处的电荷转移电阻。通过IV特性测量和电化学阻抗谱研究了DSSCs的性能。RhB、D149 和 N719 敏化 DSSC 的光转换效率分别为 1.42%、6.67% 和 6.34%。在优化条件下，染料溶液中CDA的加入显着提高了RhB、D149和N719敏化DSSCs的性能，分别提高了23.24%、15.74%和10.41%。根据奈奎斯特图分析了电化学阻抗谱，并模拟了等效电路以找出串联电阻、对电极氧化还原反应引起的电阻和 TiO2/染料/电解质界面处的电荷转移电阻。通过IV特性测量和电化学阻抗谱研究了DSSCs的性能。RhB、D149 和 N719 敏化 DSSC 的光转换效率分别为 1.42%、6.67% 和 6.34%。在优化条件下，染料溶液中CDA的加入显着提高了RhB、D149和N719敏化DSSCs的性能，分别提高了23.24%、15.74%和10.41%。根据奈奎斯特图分析了电化学阻抗谱，并模拟了等效电路以找出串联电阻、对电极氧化还原反应引起的电阻和 TiO2/染料/电解质界面处的电荷转移电阻。发现 D149 和 N719 致敏的 DSSC 分别为 1.42%、6.67% 和 6.34%。在优化条件下，染料溶液中CDA的加入显着提高了RhB、D149和N719敏化DSSCs的性能，分别提高了23.24%、15.74%和10.41%。根据奈奎斯特图分析了电化学阻抗谱，并模拟了等效电路以找出串联电阻、对电极氧化还原反应引起的电阻和 TiO2/染料/电解质界面处的电荷转移电阻。发现 D149 和 N719 致敏的 DSSC 分别为 1.42%、6.67% 和 6.34%。在优化条件下，染料溶液中CDA的加入显着提高了RhB、D149和N719敏化DSSCs的性能，分别提高了23.24%、15.74%和10.41%。根据奈奎斯特图分析了电化学阻抗谱，并模拟了等效电路以找出串联电阻、对电极氧化还原反应引起的电阻和 TiO2/染料/电解质界面处的电荷转移电阻。