Chang William B, Fang Haiyu, Liu Jun, Evans Christopher M, Russ Boris, Popere Bhooshan C, Patel Shrayesh N, Chabinyc Michael L, Segalman Rachel A
Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States.
Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States.
ACS Macro Lett. 2016 Apr 19;5(4):455-459. doi: 10.1021/acsmacrolett.6b00054. Epub 2016 Mar 18.
Conductive polymers such as PEDOT:PSS hold great promise as flexible thermoelectric devices. The thermoelectric power factor of PEDOT:PSS is small relative to inorganic materials because the Seebeck coefficient is small. Ion conducting materials have previously been demonstrated to have very large Seebeck coefficients, and a major advantage of polymers over inorganics is the high room temperature ionic conductivity. Notably, PEDOT:PSS demonstrates a significant but short-term increase in Seebeck coefficient which is attributed to a large ionic Seebeck contribution. By controlling whether electrochemistry occurs at the PEDOT:PSS/electrode interface, the duration of the ionic Seebeck enhancement can be controlled, and a material can be designed with long-lived ionic Seebeck enhancements.
诸如聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PEDOT:PSS）之类的导电聚合物作为柔性热电器件具有巨大的潜力。相对于无机材料，PEDOT:PSS的热电功率因数较小，因为其塞贝克系数较小。此前已证明离子导电材料具有非常大的塞贝克系数，并且聚合物相对于无机物的一个主要优势是室温下具有较高的离子电导率。值得注意的是，PEDOT:PSS的塞贝克系数会出现显著但短期的增加，这归因于较大的离子塞贝克贡献。通过控制PEDOT:PSS/电极界面处是否发生电化学过程，可以控制离子塞贝克增强的持续时间，并且可以设计出具有长寿命离子塞贝克增强效果的材料。
