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首页> 外文期刊>Energy Harvesting and Systems >Investigation of the Thermoelectric Power Factor of KOH-Treated PEDOT:PSS Dispersions for Printing Applications
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Investigation of the Thermoelectric Power Factor of KOH-Treated PEDOT:PSS Dispersions for Printing Applications

机译：印刷用KOH处理的PEDOT：PSS分散体的热电功率因数研究

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This work studies the modification of commercially available dispersions of intrinsically conductive polymer PEDOT:PSS with a strong base, KOH. It is concluded that addition of base derives a dedoping of the PEDOT chain and increase Seebeck coefficient from 15 μV/K to 90 μV/K. Supportive UV-Vis-NIR spectroscopy was used for tracking the doping level of the polymer. A surface morphology study of the dedoped PEDOT:PSS films was monitored by SEM. It was shown that if KOH is used in excess with respect to the acid component of PEDOT:PSS dispersions, it segregates at the surface forming crystallites. They, however could be easily removed by methanol rinsing without destroying the sample integrity. After material modification, a dispenser-printed polymer unileg-TEG with 61 unicouples was fabricated by printing. The TEG in form of 253 mm-long stripe shows a flexible behavior. At 90 K temperature difference a resulting power output of ~ 100 nW could be measured. We suggest that the low power output is due to a high internal generator resistance.
机译：这项工作研究了具有强碱KOH的本征导电聚合物PEDOT：PSS分散体的市售改性。结论是，添加碱会导致PEDOT链去掺杂，并将塞贝克系数从15μV/ K增加到90μV/ K。支持性UV-Vis-NIR光谱用于跟踪聚合物的掺杂水平。通过SEM监测了去掺杂的PEDOT：PSS膜的表面形态研究。已表明，如果相对于PEDOT：PSS分散体的酸成分使用过量的KOH，则KOH会在表面形成晶体而偏析。但是，可以通过甲醇冲洗轻松去除它们，而不会破坏样品的完整性。在材料改性之后，通过印刷来制造具有61个单对的分配器印刷的聚合物unileg-TEG。 253毫米长的条纹形式的TEG表现出灵活的行为。在90 K温差下，可以测量到约100 nW的输出功率。我们建议低功率输出归因于发电机内部的高电阻。

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