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首页> 外文期刊>RSC Advances >Supramolecular self-assembly and physical-gel formation in disc-like liquid crystals: a scalable predictive model for gelation and an application in photovoltaics
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Supramolecular self-assembly and physical-gel formation in disc-like liquid crystals: a scalable predictive model for gelation and an application in photovoltaics

机译：椎间盘状液晶的超分子自组装和物理凝胶形成：可扩展的凝胶化预测模型和光伏中的应用

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摘要

The application of triphenylene-based discotic liquid crystal derivatives as physical gelators is investigated. In particular, we focus on 2,3,6,7,10,11-hexakis-pentyloxytriphenylene (HAT5) and the longer alkyl chain homologue (HAT6). The driving mechanisms behind and parameter space of non-covalent physical gel formation is studied. A Hansen solubility parameter (HSP) approach is used to predict physical gelation of these disc-like liquid crystalline molecules in a variety of common organic and inorganic solvents important to electrochemical devices. Our results show that HSP analysis is very useful for the prediction of gel formation. The results are transferrable and can form the basis for future investigations into liquid crystalline physical gels. Furthermore, we use acetonitrile as a solvent and apply the gels as electrolytes in dye sensitized solar cells. It is observed that using a binary mixture of gelators results in average photovoltaic power conversion efficiencies as high as 7.21%, compared to a 5.9% reference electrolyte. This is attributed to a reduction in electron recombination at the n-type interface and provides further insight about hybrid gelators. Coupled with an increase in device stability, the results are promising for gel-based dye sensitized solar cells as well as potentially other electrolytic devices such as batteries and supercapacitors.
机译：研究了三苯基的盘状液晶衍生物作为物理凝胶器的应用。特别是，我们专注于2,3,6,7,10,11-己基 - 戊氧基氧基（HAT5）和较长的烷基链同源物（HAT6）。研究了非共价物理凝胶形成的驾驶机制和参数空间。汉森溶解度参数（HSP）方法用于预测这些盘状液晶分子的物理凝胶化，以各种常见的有机和无机溶剂对电化学装置重要。我们的结果表明，HSP分析对于预测凝胶形成非常有用。结果是可转移的，可以形成未来调查液晶物理凝胶的基础。此外，我们使用乙腈作为溶剂，并将凝胶涂在染料敏化太阳能电池中的电解质。观察到，与5.9％的参考电解质相比，使用凝胶剂的二元混合物导致平均光伏电转换效率高达7.21％。这归因于N型界面处的电子重组的减少，并提供了关于杂化胶凝器的进一步洞察力。再加上装置稳定性的增加，结果对凝胶的染料具有敏感的太阳能电池以及潜在的其他电解装置，例如电池和超级电容器。

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  • 来源
    《RSC Advances》 |2019年第11期|共11页
  • 作者

    Iqbal Sehrish; Khan Ammar A.;

  • 作者单位

    LUMS Dept Phys Syed Babar Ali Sch Sci &

    Engn Sect U DHA Lahore 54792 Pakistan;

    LUMS Dept Phys Syed Babar Ali Sch Sci &

    Engn Sect U DHA Lahore 54792 Pakistan;

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  • 正文语种 eng
  • 中图分类 化学;
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