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Effect of aging conditions on the performance of dip coated platinum counter electrode based dye sensitized solar cells

机译：老化条件对浸镀铂对照电极染料敏化太阳能电池性能的影响

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摘要

Platinum is the most widely accepted excellent catalytic material for counter electrodes in dye sensitized solar cells (DSSCs). The problems associated with platinum are high cost and low corrosion resistance against the iodide/triiodide redox couple. Use of platinum nanoparticles for counter electrodes resolves the cost issue. The present work shows the effect of different aging conditions on the performance of DSSCs fabricated using platinum nanoparticle based counter electrodes. Two conditions - room temperature under darkness (R-D) and heating (60 degrees C) under illumination (H-I) - were chosen for the aging studies. Platinum nanoparticles with a size of similar to 2 nm were synthesized and a dip coating process was followed to fabricate counter electrodes. Electrolyte (iodide/triiodide) and counter electrode interaction were studied by fabricating symmetric cells composed of two platinized electrodes. It was found that platinum almost entirely reacted with the electrolyte within 51 days for the H-I condition aged symmetric cell, whereas R- D condition aging was relatively ineffective in the dissolution of platinum. Interestingly, in DSSCs aged under the H-I condition for 3 months, photoconversion activity was still observed, which was later attributed to the presence of platinum on the counter electrode. So, in short circuit conditions under illumination, the dissolution of platinum by the electrolyte is delayed. The R-D condition aged cell showed a smaller decrease in performance compared to the H-I condition aged cell. Other components of the DSSCs such as titania film and dye were also characterized. Finally, it was found that apart from dissolution of platinum from the counter electrode, desorption of additives or ions of electrolyte from titania are also responsible for the decay in DSSC performance with aging.
机译：铂是染料敏化太阳能电池（DSSCs）的反电极最广泛接受的优异催化材料。与铂相关的问题是对碘/三碘氧化还原耦合的高成本和低腐蚀性。使用铂纳米粒子进行反电极解决了成本问题。目前的作品显示了不同老化条件对使用基于铂纳米粒子的反电极制造的DSSCs的性能的影响。两个条件 - 在暗度（R-D）下的室温（R-D）和照明（H-I）下的加热（60℃） - 用于老化研究。合成尺寸与2nm相似的铂纳米颗粒，然后沿浸涂过程进行制造反电极。通过制造由两个镀铂电极组成的对称电池来研究电解质（碘化物/三碘化物）和对电极相互作用。发现铂几乎完全与电解质在51天内与电解质反应的H-I条件老化对称细胞，而R-D条件老化在铂溶解中相对无效。有趣的是，在H-I条件下为3个月的DSSC，仍然观察到光电转化活性，后来归因于对电极上的铂的存在。因此，在照明的短路条件下，电解质铂的溶解延迟。与H-I条件老化细胞相比，R-D条件老化细胞显示出的性能较小。还表征了DSSC的其他组分，如二氧化钛膜和染料。最后，发现除了来自对电极的铂的溶解外，来自二氧化钛的添加剂或电解质的离子的解吸也是衰老的衰减中的衰减。

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  • 来源
    《RSC Advances》 |2015年第24期|共8页
  • 作者

    Mohanty Shyama Prasad; More Venumadhav; Bhargava Parag;

  • 作者单位

    Indian Inst Technol Dept Met Engn &

    Mat Sci Bombay 400076 Maharashtra India;

    Indian Inst Technol Dept Met Engn &

    Mat Sci Bombay 400076 Maharashtra India;

    Indian Inst Technol Dept Met Engn &

    Mat Sci Bombay 400076 Maharashtra India;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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