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首页> 外文期刊>RSC Advances >A supramolecular assembling of zinc porphyrin with a pi-conjugated oligo(phenylenevinylene) (oPPV) molecular wire for dye sensitized solar cell
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A supramolecular assembling of zinc porphyrin with a pi-conjugated oligo(phenylenevinylene) (oPPV) molecular wire for dye sensitized solar cell

机译：用PI-缀合的寡核苷酸（苯乙烯）（苯乙烯）（OPPV）分子线用于染料的锌卟啉的超分子组装

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摘要

A novel p-conjugated oligo(phenylenevinylene) (oPPV) (or LC) was prepared, as a new organic dye for dye-sensitized solar cells (DSSC), which contains a cyanoacrylic acid group on one end and a pyridyl group on the other. Solar cells sensitized by LC were fabricated, and were found to exhibit a power conversion efficiency (PCE) value of 2.45%. Furthermore, we describe the formation of a supramolecular dyad (ZnTPP-LC) via a metal-ligand bond between LC, since its pyridyl group allows it to interact with several metal centers, and zinc-tetraphenyl-porphyrin (ZnTPP) onto the photoelectrode's TiO2 surface of the solar cell. More specifically, LC was bound at first onto TiO2 with its cyanoacrylic acid anchoring group, and then a metal-ligand supramolecular bond was formed, with the addition of a porphyrinic solution, between the nitrogen atom of LC's pyridyl group and the zinc. ZnTPP-LC solar cell was then fabricated resulting in a record PCE value of 5.27% concerning the supramolecular DSSCs. As shown by photovoltaic measurements (J-V curves) and incident photon to current conversion efficiency (IPCE) spectra of the two solar cells, the higher PCE value of the supramolecular one can be attributed to its enhanced photovoltaic parameters, and particularly its enhanced short circuit current (J(sc)). This J(sc) improvement is due to ZnTPP-LC's higher light-harvesting efficiency and the larger electron injection of both ZnTPP and LC into TiO2's conduction band (CB) of the corresponding solar cell. These results are in accordance with electrochemical impedance spectra (EIS) of the DSSCs, which revealed longer electron lifetime, higher charge recombination resistance and shorter electron transport time for the solar cell based on ZnTPP-LC as compared to the one sensitized by LC.
机译：制备一种新型p缀合的寡核苷酸（苯基乙烯基）（OPPV）（或LC），作为用于染料敏化太阳能电池（DSSC）的新有机染料，其在一端上含有氰基丙烯酸基团，另一个吡啶基。由LC致敏的太阳能电池制备，并发现表现出功率转换效率（PCE）值为2.45％。此外，我们描述了通过LC之间的金属 - 配体键形成超分子二元（ZnTPP-LC），因为其吡啶基使其与几种金属中心相互作用，而锌 - 四苯基 - 卟啉（ZnTPP）在光电极的TiO 2上相互作用太阳能电池的表面。更具体地，将LC首先与其氰基丙烯酸锚固基团结合到TiO 2上，然后在LC吡啶基和锌的氮原子之间加入卟啉溶液，形成金属 - 配体超分子键。然后制造ZnTPP-LC太阳能电池，导致RCE值为8.27％的关于超分子DSSCs。如光伏测量（JV曲线）和入射光仪到两个太阳能电池的电流转换效率（IPCE）光谱所示，超分子的PCE值可以归因于其增强的光伏参数，特别是其增强的短路电流（j（sc））。该J（SC）改进是由于ZnTPP-LC较高的光收集效率和ZnTPP和LC的较大电子注入相应太阳能电池的TiO2的导电带（CB）。这些结果符合DSSC的电化学阻抗谱（EIS），其揭示了基于ZnTPP-LC的太阳能电池的更长的电子寿命，更高的电荷重组阻力和较短的电子传输时间，与LC致敏的ZnTPP-LC相比。

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