材料科学
热电效应
碳纳米管
功勋
热电材料
数码产品
光电子学
碲化铋
溅射沉积
热导率
溅射
半导体
热电发电机
散热片
纳米技术
工程物理
复合材料
机械工程
薄膜
电气工程
物理
工程类
热力学
作者
Ying Liu,Jixiang Qiao,Yang Zhao,Qing Lan,Pengyan Mao,Jianhang Qiu,Kaiping Tai,Chang Liu,Hui‐Ming Cheng
标识
DOI:10.1016/j.jmst.2020.03.066
摘要
Thermoelectric (TE) materials and devices have attracted great attention due to their ability to convert waste heat to electrical power and active cooling. However, the conventional bulk TE materials are inorganic semiconductors with inherent brittleness and rigidity. They cannot closely contact curved heat sources and sinks, which limits their application in modern electronics. It remains a big challenge to fabricate high-performance TE materials and devices with good flexibility. Here, we report a flexible TE device comprised of a single wall carbon nanotube (SWCNT) network and (000l)-textured Bi2Te3 nanocrystals prepared by a magnetron sputtering technique. The unique Bi2Te3-SWCNT hybrid structure has a TE figure of merit (ZT) value of ∼0.23 at ∼330 K. A prototype TE device made of this hybrid gives a maximum output power density of ∼0.93 mW cm−2 under a temperature difference of 25 K at ambient temperature and shows good flexibility under bending. Our results open up a new way to the development of flexible TEs and their application in self-powered portable devices.
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