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Substrate Modification for High-Performance Thermoelectric Materials and Generators Based on Polymer and Carbon Nanotube Composite
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2022-07-17 , DOI: 10.1002/admi.202201193 Hongfeng Huang 1 , Zhanhua Chen 1 , Xiaomin Chen 1 , Jiaoying Jin 1 , Si Huang 1 , Dagang Wang 1 , Lei Wang 1 , Danqing Liu 1
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2022-07-17 , DOI: 10.1002/admi.202201193 Hongfeng Huang 1 , Zhanhua Chen 1 , Xiaomin Chen 1 , Jiaoying Jin 1 , Si Huang 1 , Dagang Wang 1 , Lei Wang 1 , Danqing Liu 1
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Polymer and carbon nanotube composites have aroused extensive attention for thermoelectric materials owing to the combination of low thermal conductivity of polymer and high electrical conductivity of carbon nanotubes. Surface properties of the substrate are of great importance for the charge transport behaviors of semiconducting thin films, which are less explored in thermoelectric applications. Herein, self-assembled monolayers (SAMs) are used to modify the substrate for thermoelectric polymer composites. The trifluoromethyl (CF3)-terminated SAM is beneficial for an improved electrical conductivity; while the SAM with amino group is found to improve their Seebeck coefficient and decrease the electrical conductivity. As a result, polymer composites on CF3-SAM-modified substrate show a high room-temperature power factor of 285 µW m−1 K−2 and a large output power of 2.36 µW for thermoelectric generator at a temperature gradient of 50 K. This work demonstrates that surface modification by SAMs is a promising strategy for improving performance of thermoelectric materials and devices.
中文翻译：
基于聚合物和碳纳米管复合材料的高性能热电材料和发电机的基板改性
由于聚合物的低导热性和碳纳米管的高导电性相结合，聚合物和碳纳米管复合材料引起了热电材料的广泛关注。衬底的表面特性对于半导体薄膜的电荷传输行为非常重要，而这在热电应用中的探索较少。在此，自组装单分子层 (SAM) 用于改性热电聚合物复合材料的基板。三氟甲基（CF 3）封端的SAM有利于提高电导率；而具有氨基的SAM被发现提高了它们的塞贝克系数并降低了电导率。因此，CF 3上的聚合物复合材料-SAM 改性衬底在 50 K 的温度梯度下显示出 285 µW m -1 K -2的高室温功率因数和 2.36 µW 的大输出功率。这项工作表明 SAM 的表面改性是一种改善热电材料和器件性能的有前景的策略。
更新日期：2022-07-17
中文翻译：
基于聚合物和碳纳米管复合材料的高性能热电材料和发电机的基板改性
由于聚合物的低导热性和碳纳米管的高导电性相结合，聚合物和碳纳米管复合材料引起了热电材料的广泛关注。衬底的表面特性对于半导体薄膜的电荷传输行为非常重要，而这在热电应用中的探索较少。在此，自组装单分子层 (SAM) 用于改性热电聚合物复合材料的基板。三氟甲基（CF 3）封端的SAM有利于提高电导率；而具有氨基的SAM被发现提高了它们的塞贝克系数并降低了电导率。因此，CF 3上的聚合物复合材料-SAM 改性衬底在 50 K 的温度梯度下显示出 285 µW m -1 K -2的高室温功率因数和 2.36 µW 的大输出功率。这项工作表明 SAM 的表面改性是一种改善热电材料和器件性能的有前景的策略。
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