標題: | Graphene-Au nanoparticle based vertical heterostructures: A novel route towards high-ZT Thermoelectric devices |
作者: | Juang, Zhen-Yu Tseng, Chien-Chih Shi, Yumeng Hsieh, Wen-Pin Ryuzaki, Sou Saito, Noboru Hsiung, Chia-En Chang, Wen-Hao Hernandez, Yenny Han, Yu Tamada, Kaoru Li, Lain-Jong 電子物理學系 Department of Electrophysics |
關鍵字: | Thermoelectric;Graphene;Nanoparticle;Heterostructure |
公開日期: | 1-八月-2017 |
摘要: | Monolayer graphene exhibits impressive in-plane thermal conductivity (> 1000 W m(-1) K-1). However, the out-of-plane thermal transport is limited due to the weak van der Waals interaction, indicating the possibility of constructing a vertical thermoelectric (TE) device. Here, we propose a cross-plane TE device based on the vertical heterostructures of few-layer graphene and gold nanoparticles (AuNPs) on Si substrates, where the incorporation of AuNPs further inhibits the phonon transport and enhances the electrical conductivity along vertical direction. A measurable Seebeck voltage is produced vertically between top graphene and bottom Si when the device is put on a hot surface and the figure of merit ZT is estimated as 1 at room temperature from the transient Harman method. The polarity of the output voltage is determined by the carrier polarity of the substrate. The device concept is also applicable to a flexible and transparent substrate as demonstrated. |
URI: | http://dx.doi.org/10.1016/j.nanoen.2017.06.004 http://hdl.handle.net/11536/145767 |
ISSN: | 2211-2855 |
DOI: | 10.1016/j.nanoen.2017.06.004 |
期刊: | NANO ENERGY |
Volume: | 38 |
起始頁: | 385 |
結束頁: | 391 |
顯示於類別: | 期刊論文 |