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首页> 外文期刊>Chemistry: A European journal >Factors Affecting the Performance of Champion Silyl-Anchor Carbazole Dye Revealed in the Femtosecond to Second Studies of Complete ADEKA-1 Sensitized Solar Cells
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Factors Affecting the Performance of Champion Silyl-Anchor Carbazole Dye Revealed in the Femtosecond to Second Studies of Complete ADEKA-1 Sensitized Solar Cells

机译：在飞秒中揭示的影响冠军甲硅烷基-锚固咔唑染料性能的因素对完整的ADEKA-1敏化太阳能电池进行了二次研究

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Record laboratory efficiencies of dye-sensitized solar cells have been recently reported using an alkoxysilyl-anchor dye, ADEKA-1 (over 14%). In this work we use time-resolved techniques to study the impact of key preparation factors (dye synthesis route, addition of co-adsorbent, use of cobalt-based electrolytes of different redox potential, creation of insulating Al2O3 layers and molecule capping passivation of the electrode) on the partial charge separation efficiencies in ADEKA-1 solar cells. We have observed that unwanted fast recombination of electrons from titania to the dye, probably associated with the orientation of the dyes on the titania surface, plays a crucial role in the performance of the cells. This recombination, taking place on the sub-ns and ns time scales, is suppressed in the optimized dye synthesis methods and upon addition of the co-adsorbent. Capping treatment significantly reduces the charge recombination between titania and electrolyte, improving the electron lifetime from tens of ms to hundreds of ms, or even to single seconds. Similar increase in electron lifetime is observed for homogenous Al2O3 over-layers on titania nanoparticles, however, in this case the total solar cells photocurrent is decreased due to smaller electron injection yield from the dye. Our studies should be important for a broader use of very promising silyl-anchor dyes and the further optimization and development of dye-sensitized solar cells.
机译：最近已经报道了使用烷氧基甲硅烷基锚染料ADEKA-1（超过14％）对染料敏化太阳能电池的实验室效率达到了创纪录的水平。在这项工作中，我们使用时间分辨技术研究关键制备因素的影响（染料合成路线，添加共吸附剂，使用具有不同氧化还原电势的钴基电解质，创建绝缘的Al2O3层以及对分子进行封端钝化）。电极）在ADEKA-1太阳能电池中的部分电荷分离效率。我们已经观察到，电子从二氧化钛到染料的不需要的快速重组，可能与二氧化钛表面上染料的取向有关，在细胞性能中起着至关重要的作用。这种在亚ns和ns时间尺度上发生的重组在优化的染料合成方法中以及在添加共吸附剂后得到抑制。封端处理显着降低了二氧化钛与电解质之间的电荷复合，从而将电子寿命从数十毫秒提高到了数百毫秒，甚至达到了几秒钟。对于二氧化钛纳米粒子上的均质Al2O3覆盖层，观察到了类似的电子寿命增长，但是，在这种情况下，由于染料的电子注入量较小，总太阳能电池的光电流降低了。我们的研究对于广泛使用非常有前途的甲硅烷基锚固染料以及进一步优化和开发敏化染料的太阳能电池至关重要。

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