Enhanced power factor in flexible reduced graphene oxide/nanowires hybrid films for thermoelectrics
Enhanced power factor in flexible reduced graphene oxide/nanowires hybrid films for thermoelectrics
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用于热电的柔性还原氧化石墨烯/纳米线混合薄膜的增强功率因数
DOI：
10.1039/c6ra00916f
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发表时间：
2016-01-01
期刊：
影响因子：
3.9
通讯作者：
Chen, Yu
中科院分区：
文献类型：
--
作者：
Gao, Jie;Liu, Chengyan;Chen, Yu
采用真空过滤法制备了基于还原氧化石墨烯（RGO）和碲纳米线（Te NW）层状结构的高柔性热电复合薄膜。优化后的混合薄膜的电导率和Seebeck系数分别达到978 S m−1和286 μV K−1，在40 °C下将功率因数（PF）值推高至80 μW（m K2）−1，约为纯Te NW薄膜的80倍，这可能是由于RGO的高载流子浓度和Te NW的高载流子迁移率的结合。同时，通过电导率、Seebeck系数和霍尔效应的测量，揭示了杂化膜的输运特性。本文提供了一种基于RGO片材和无机半导体的高性能和柔性TE薄膜的可能途径。
Highly-flexible thermoelectric hybrid films based on reduced graphene oxide (RGO) and tellurium nanowire (Te NW) layered structure are fabricated via vacuum filtration. The electrical conductivity and Seebeck coefficient of the optimized hybrid film can reach 978 S m−1 and 286 μV K−1, respectively, pushing the power factor (PF) value up to 80 μW (m K2)−1 at 40 °C, approximately 80 times larger than the pure Te NW film, possibly due to the combination of the high carrier concentration of RGO and high carrier mobility of Te NWs. Meanwhile, the transport characteristics of hybrid films were revealed by the measurements of electrical conductivity, Seebeck coefficient, and Hall effect. This article provides a possible access to high-performance and flexible TE films based on RGO sheets and inorganic semiconductors.