PEDOT纳米线/PEDOT纳米复合薄膜的热电性能研究

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• 英文论文题名：Thermoelectric Properties of PEDOT Nanowires/PEDOT Hybrids
• 论文作者：张坤 ; 邱晶晶 ; 王诗任
• 英文论文作者：Kun Zhang ; Jingjing Qiu ; Shiren Wang ; College of Textiles ; Donghua University ; Department of Industrial and Systems Engineering ; Texas A&M University ; Key Laboratory of Textile Science & Technology ; Ministry of Education ; Department of Mechanical Engineering ; Texas Tech University
• 年：2016
• 作者机构：东华大学纺织学院;德州农工大学工业与系统工程系;东华大学纺织面料技术教育部重点实验室;德州理工大学机械工程系;
• 论文关键词：热电性能 ; PEDOT纳米线 ; 复合薄膜 ; 能量筛选效应
• 英文论文关键词：thermoelectric ; PEDOT nanowires ; hybrid ; energy filtering
• 会议召开时间：2016-07-01
• 会议录名称：中国化学会第30届学术年会摘要集-第二十一分会：π-共轭材料
• 语种：中文
• 分类号：O631;TB383.2
• 学会代码：ZGHY
• 会议名称：中国化学会第30届学术年会
• 会议地点：中国辽宁大连
• 主办单位：中国化学会
• 学会名称：中国化学会
• 页数：2
• 文件大小：128k
• 原文格式：O
• 会议级别：全国

摘要

本文研究了一种聚乙撑二氧噻吩(PEDOT)纳米线填充PEDOT聚合物的纳米复合薄膜的热电性能。采用柔性模版法制备的PEDOT纳米线被分别填充到聚苯乙烯磺酸钠掺杂的PEDOT聚合物(PEDOT:PSS)和甲苯磺酸盐掺杂的PEDOT聚合物(PEDOT:Tosylate)中。通过原子力显微镜表征可知PEDOT纳米线均匀分布在聚合物基体中。进而我们研究了这两类PEDOT纳米线/PEDOT纳米复合薄膜的热电性能,包括塞贝克系数(Seebeck coefficient)、电导率和热电功率因子(Power factor)。研究结果表明:含0.2wt%PEDOT纳米线的PEDOT:PSS纳米复合薄膜的热电功率因子是不含PEDOT纳米线的PEDOT:PSS基体的近9倍之多,达到102.7μWm~(-1)K~(-2)。此热电功率因子的增加是由于三种因素的协同效应导致的,包括PEDOT纳米线与PEDOT基体之间的界面能量筛选效应、PEDOT:PSS基体以及复合薄膜的载流子浓度的减小。为了进一步提高PEDOT的热电功率因子,我们制备了含PEDOT纳米线的PEDOT:Tosylate纳米复合薄膜。研究发现,通过添加0.2wt%的PEDOT纳米线,PEDOT:Tosylate的热电功率因子可提高到446.6μWm~(-1)K~(-2),并估算可知其热电转换优值ZT在300K时约为0.44。
Freestanding poly(3,4-ethylenedioxythiophene)(PEDOT) nanowires were synthesized by template-confined in-situ polymerization,and then integrated into polystyrene sulfonate(PSS)-doped PEDOT and tosylate-doped PEDOT hosts,respectively.The hybrid morphologies were characterized by atomic force microscopy,indicating homogenous dispersion of PEDOT nanowires.Thermoelectric properties of the resultant hybrids were measured,and the power factor was found to be enhanced by 9-fold in comparison to PEDOT:PSS mixed with 5 vol%dimethyl sulfoxide while the low thermal conductivity was still maintained.Such a significant improvement could be attributed to the synergistic effects of interfacial energy filtering,component contributions,and changes of carrier concentration in the host materials.Upon addition of 0.2 wt%PEDOT nanowires,the resultant composites demonstrated a power factor as high as 446.6 uW m " K" and thermoelectric figure of merit could reach 0.44 at room temperature.These findings open up a new route towards high-performance polymer thermoelectric materials and devices.

引文

[1]Han,M.G.;Foulger,S.H.Small 2006,2:1164.
    [2]Zhang,K.;Qiu,J.;Wang,S.Nanoscale 2016,8:8033.