Heat and Charge Carrier Flow through Single-Walled Carbon Nanotube Films in Vertical Electrolyte-Gated Transistors: Implications for Thermoelectric Energy Conversion
Heat and Charge Carrier Flow through Single-Walled Carbon Nanotube Films in Vertical Electrolyte-Gated Transistors: Implications for Thermoelectric Energy Conversion
复制标题
垂直电解质门控晶体管中单壁碳纳米管薄膜的热和电荷载流子流动：对热电能量转换的影响
DOI：
10.1021/acsanm.2c01687
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发表时间：
2022
影响因子：
5.9
通讯作者：
Yanagi Kazuhiro
中科院分区：
文献类型：
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作者：
Ueji Kan;Muto Nobuhiro;Heimfarth Daniel;Matsuoka Yuya;Ichinose Yota;Yomogida Yohei;Yagi Takashi;Zaumseil Jana;Yanagi Kazuhiro
了解薄膜的电特性和热特性之间的关系对于薄膜的热管理至关重要。然而，几乎没有关于这种关系的可靠实验数据，因为可以在同一方向上评估这两个特性的测量方法非常有限。在这里，我们报告了一种测量技术，可以同时评估电气和热特性相结合的时域热反射和垂直电解质门控晶体管。我们证明了单壁碳纳米管薄膜的热导率与垂直电流密度无关，垂直电流密度被调制超过4个数量级，这表明了提高热电转换效率的途径。
Understanding the relationship between electrical and thermal characteristics of thin films is crucial for their thermal management. However, there are hardly any reliable experimental data on this relationship because measurement methods that can evaluate both characteristics in the same direction are very limited. Here, we report a measurement technique that can simultaneously evaluate electrical and thermal characteristics by combining time-domain thermoreflectance and vertical electrolyte-gated transistors. We demonstrate that the thermal conductivity of single-walled carbon nanotube films is independent of the vertical current density, which is modulated over 4 orders of magnitude, indicating a route to improve thermoelectric conversion efficiencies.