Interfacial enhancement effect of graphene quantum dots on PEDOT:PSS/single-walled carbon nanotubes thermoelectric materials

被引:17
作者
Fu, Ping [1 ]
Xiao, Jin-Kun [1 ]
Gong, Jia-Zhi [1 ]
Zhu, Ying [1 ]
Yao, Jun-An [1 ]
Zhang, Yun-Fei [1 ]
Wang, Sheng-Gao [1 ]
Lin, Zhi-Dong [1 ]
Du, Fei-Peng [1 ]
机构
[1] Wuhan Inst Technol, Sch Mat Sci & Engn, Wuhan 430205, Peoples R China
基金
中国国家自然科学基金;
关键词
PEDOT:PSS; Graphene quantum dots; Single-walled carbon nanotubes; Hybrid; Thermoelectric properties; THIN-FILMS; PERFORMANCE; COMPOSITES; POSTTREATMENT; BEHAVIOR; DEVICES;
D O I
10.1016/j.synthmet.2021.116861
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In the present study, Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonic acid) (PEDOT:PSS), with the incorporation of graphene quantum dot (GQD)-coated single-walled carbon nanotubes (SWCNTs), has been used in the preparation of PEDOT:PSS/SWCNTs/GQDs thermoelectric films (PSG). The effect of SWCNTs/GQDs (as a nanofiller) on the microstructure and thermoelectric properties of the composite films has been especially investigated. It was observed that the addition of GQDs will induce a phase separation between PEDOT and PSS. Furthermore, the enhanced interfacial bonding induced a microstructure ordering and an accelerated transport of carriers. The in-plane electrical conductivity and Seebeck coefficient of the obtained film reached 1036 S.cm(-1) and 13.8 mu V.K-1, respectively, for 1 wt% of SWCNTs/GQDs. These results gave a high power factor (PF) of up to 19.9 mu W.m(-1).K-2, which is about six times as high as for pristine PEDOT:PSS and also higher than that of PEDOT:PSS/SWCNTs. The obtained maximum ZT reaches 3.22 x 10(-3) with high PF value and low in-plane thermal conductivity. The present research provided a new strategy for developing high performance organic thermoelectric materials.
引用
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页数:7
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