TY - JOUR
T1 - Thermoelectric properties of composite films prepared with benzodithiophene derivatives and carbon nanotubes
AU - Zhou, Xiaoyan
AU - Pan, Chengjun
AU - Liang, Ansheng
AU - Wang, Lei
AU - Wong, Wai Yeung
N1 - Funding Information:
The authors acknowledge financial support from the National Natural Science Foundation of China (Grant Nos.51202150 and 51272161), Shenzhen Science and Technology Research Grant (Nos. JCYJ20150827155136104), Hong Kong Research Grants Council (PolyU 12338416), and the Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province (GD201707).
PY - 2017/6/16
Y1 - 2017/6/16
N2 - Benzodithiophene (BDT)-based conjugated polymers have garnered considerable interest due to their planar backbones and improved carrier mobility, and have found wide application in organic field-effect transistors and organic photovoltaics. However, there are few reports on the use of these conjugated polymers as thermoelectric materials. In this work, the conjugated polymer poly(benzo[1,2-b:4,5-b’]dithiophene-alt-3,4-ethylenedioxythiophene) (PBDT-EDOT) was synthesized to investigate the thermoelectric behavior of its composite films with single-walled carbon nanotubes (SWCNTs). The polymer was characterized by 1H NMR, gel permeation chromatography, thermal gravimetric analysis and differential scanning calorimetry. The thermoelectric properties, carrier concentration and mobility of the composite films were also measured. It was found that the composite with an SWCNT content of 30% exhibited a high Seebeck coefficient of 82.1 μV K−1 at room temperature. Additionally, for composites with SWCNT contents below 90%, the power factors reached the highest values at the glass transition point of PBDT-EDOT in the temperature range of 300–400 K.
AB - Benzodithiophene (BDT)-based conjugated polymers have garnered considerable interest due to their planar backbones and improved carrier mobility, and have found wide application in organic field-effect transistors and organic photovoltaics. However, there are few reports on the use of these conjugated polymers as thermoelectric materials. In this work, the conjugated polymer poly(benzo[1,2-b:4,5-b’]dithiophene-alt-3,4-ethylenedioxythiophene) (PBDT-EDOT) was synthesized to investigate the thermoelectric behavior of its composite films with single-walled carbon nanotubes (SWCNTs). The polymer was characterized by 1H NMR, gel permeation chromatography, thermal gravimetric analysis and differential scanning calorimetry. The thermoelectric properties, carrier concentration and mobility of the composite films were also measured. It was found that the composite with an SWCNT content of 30% exhibited a high Seebeck coefficient of 82.1 μV K−1 at room temperature. Additionally, for composites with SWCNT contents below 90%, the power factors reached the highest values at the glass transition point of PBDT-EDOT in the temperature range of 300–400 K.
KW - Carbon nanotubes
KW - Conducting polymer
KW - Polymer-matrix composites (PMCs)
KW - Thermoelectric performance
UR - http://www.scopus.com/inward/record.url?scp=85016638661&partnerID=8YFLogxK
U2 - 10.1016/j.compscitech.2017.03.040
DO - 10.1016/j.compscitech.2017.03.040
M3 - Journal article
AN - SCOPUS:85016638661
SN - 0266-3538
VL - 145
SP - 40
EP - 45
JO - Composites Science and Technology
JF - Composites Science and Technology
ER -
