期刊
ADVANCED FUNCTIONAL MATERIALS
卷 25, 期 20, 页码 3004-3012出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201404397
关键词
field-effect transistor; organic semiconductors; thermoelectric
类别
资金
- Major State Basic Research Development Program [2013CB632500]
- Chinese Academy of Sciences [XDB12010000]
- National Natural Science Foundation [21422310, 61171055, 21333011]
Organic thermoelectric materials, which can transform heat flow into electricity, have great potential for flexible, ultra-low-cost and large-area thermoelectric applications. Despite rapid developments of organic thermoelectric materials, exploration and investigation of promising organic thermoelectric semiconductors still remain as a challenge. Here, the thermoelectric properties of several p- and n-type organic semiconductors are investigated and studied, in particular, how the electric field modulations of the Seebeck coefficient in organic field-effect transistors (OFETs) compare with the Seebeck coefficient in chemically doped films. The extracted relationship between the Seebeck coefficient (S) and electrical conductivity (sigma) from the field-effect transistor (FET) geometry is in good agreement with that of chemically doped films, enabling the investigation of the trade-off relationship among sigma, S, carrier concentration, and charging level. The results make OFETs an effective candidate for the thermoelectric studies of organic semiconductors.
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