標題: Power Factor Enhancement for Few-Layered Graphene Films by Molecular Attachments
作者: Sim, Daohao
Liu, Dayong
Dong, Xiaochen
Xiao, Ni
Li, Sean
Zhao, Yang
Li, Lain-Jong
Yan, Qingyu
Hng, Huey Hoon
田家炳光電中心
Tin Ka Ping Photonics Center
公開日期: 10-Feb-2011
摘要: In this work, we prepared few-layered graphene (FLG) films and investigated their thermoelectric properties. It was found that pristine FLG films showed a low thermopower of similar to 40 mu V/K. We further processed these FLG films by attaching them with 1,1'-azobis(cyanocyclohexane) or 1,3,6,8-pyrenetetrasulfonic acid. The thermopower of FLG films with attached molecules increased to above similar to 180 mu V/K. Such enhancement in the thermopower led to an increase in their power factor by more than 4.5 times. Theoretical investigation indicated that a potential difference can be introduced between the outer layer and inner layer of FLG films upon molecule attachments. Simulation of the thermopower based on Kubo's formula provided qualitative support to our experimental results.
URI: http://dx.doi.org/10.1021/jp1103609
http://hdl.handle.net/11536/9308
ISSN: 1932-7447
DOI: 10.1021/jp1103609
期刊: JOURNAL OF PHYSICAL CHEMISTRY C
Volume: 115
Issue: 5
起始頁: 1780
結束頁: 1785
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