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首页> 外文期刊>RSC Advances >Fabrication and analysis of dye-sensitized solar cells (DSSCs) using porphyrin dyes with catechol anchoring groups
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Fabrication and analysis of dye-sensitized solar cells (DSSCs) using porphyrin dyes with catechol anchoring groups

机译：使用卟啉染料与儿茶酚锚定组的制备和分析染料敏化太阳能电池（DSSCs）

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Herein we report the preparation and application of 4 different zinc( II ) tetrakis(dihydroxyphenyl) porphyrins (ZnTDHPP) as the sensitizing dyes in dye-sensitized solar cells (DSSCs). The experimental results include solution and solid state UV-Vis data, steady state current–voltage characteristics, and our theoretical analysis comprised of density functional theory (DFT) and Langmuir isotherm adsorption formalism. The results show that the Zn tetrakis(2,3-dihydroxyphenyl) porphyrin (Zn2,3TDHPP) and Zn tetrakis(3,4-dihydroxyphenyl) porphyrin (Zn3,4TDHPP) with adjacent hydroxyl groups attaches to a TiO _(2) surface much more strongly than carboxylate. The catechol anchoring group showed high stability of the dye on the TiO _(2) surface. The cells prepared from these porphyrins showed no significant desorption of dye from the TiO _(2) surface after several days. The DSSCs based on Zn2,3TDHPP showed the best photovoltaic performance under AM 1.5 irradiation comparable to the conventional Zn tetrakis( p -carboxyphenyl) porphyrin (ZnTCPP), despite lower dye loading on the TiO _(2) surface. However, non-cooperative OH bonding to TiO _(2) for Zn2,4TDHPP and Zn2,5TDHPP shows weak attachment to the TiO _(2) surface and lower efficiencies. DFT calculations showed that the Zn2,3TDHPP structure is more non-planar than the others, which may suppress dye aggregation. The adopted adsorption modeling is fitted to the experimental data to study the kinetics of dye loading. The study can herald development of a new class of porphyrin sensitizer for DSSC applications.
机译：在此，我们报告了4种不同锌（II）四（二羟基苯基）卟啉（ZnTDHPP）作为染料敏化太阳能电池（DSSCs）中的敏化染料的制备和施用。实验结果包括溶液和固态UV-Vis数据，稳态电流 - 电压特性，以及由密度函数理论（DFT）和Langmuir等温机吸附形式主义组成的理论分析。结果表明，具有相邻羟基的Zn四羟基苯基）卟啉（Zn2,3-二羟基苯基）卟啉（Zn2,3TDHPP）和Zn四羟基苯基）卟啉（Zn3,4tDHPP）与TiO _（2）表面相连比羧酸盐更强烈。儿茶酚锚定组在TiO _（2）表面上显示染料的高稳定性。由这些卟啉制备的细胞显示出几天后从TiO _（2）表面的显着解吸染料。尽管在TiO _（2）表面上较低的染料负载，但基于Zn2,3tDHPP的基于Zn2,3tDHPP的DSSCs显示出的最佳光伏性能。然而，对于Zn2,4TDHPP和Zn2,5​​TDHPP的非协同OH键合至TiO _（2）显示到TiO _（2）表面和较低效率的弱附着。 DFT计算表明，Zn2,3TDHPP结构比其他Zn2,3TDHPP结构更加非平面，这可能抑制染料聚集。采用的吸附建模适用于实验数据，以研究染料负载的动力学。该研究可以制定新一类DSSC应用的新类卟啉敏化剂。

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