Oh Jin Young, Shin Minkwan, Lee Jae Bok, Ahn Jong-Hyun, Baik Hong Koo, Jeong Unyong
Department of Materials Science and Engineering and ‡Department of Electrical and Electronic Engineering, Yonsei University , 134 Shinchon-dong, Seoul, Korea.
ACS Appl Mater Interfaces. 2014 May 14;6(9):6954-61. doi: 10.1021/am500769k. Epub 2014 Apr 23.
The use of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) in electrodes and electrical circuits presents a number of challenges that are yet to be overcome, foremost amongst which are its relatively low conductivity, low coatability on hydrophobic substrates, and decreased conductivity at large strains. With this in mind, this study suggests a simple way to simultaneously address all of these issues through the addition of a small amount of a nonionic surfactant (Triton X-100) to commercial PEDOT:PSS solutions. This surfactant is shown to considerably reduce the surface tension of the PEDOT:PSS solution, thus permitting conformal coatings of PEDOT:PSS thin film on a diverse range of hydrophobic substrates. Furthermore, this surfactant induces the formation of PEDOT nanofibrils during coating, which led to the high conductivity values and mechanical stability at large strains (ε=10.3%). Taking advantage of the superior characteristics of these PEDOT:PSS thin films, a highly flexible polymer solar cell was fabricated. The power conversion efficiency of this solar cell (3.14% at zero strain) was preserved at large strains (ε=7.0%).
聚（3,4 - 亚乙基二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT:PSS）在电极和电路中的应用存在许多有待克服的挑战，其中最主要的是其相对较低的导电性、在疏水基材上的低可涂覆性以及在大应变下导电性下降。考虑到这一点，本研究提出了一种简单的方法，通过向商用PEDOT:PSS溶液中添加少量非离子表面活性剂（Triton X - 100）来同时解决所有这些问题。结果表明，这种表面活性剂可显著降低PEDOT:PSS溶液的表面张力，从而使PEDOT:PSS薄膜能够在各种疏水基材上实现保形涂层。此外，这种表面活性剂在涂层过程中诱导形成PEDOT纳米纤维，这导致了高电导率值以及在大应变（ε = 10.3%）下的机械稳定性。利用这些PEDOT:PSS薄膜的优异特性，制备了一种高度柔性的聚合物太阳能电池。该太阳能电池的功率转换效率（零应变时为3.14%）在大应变（ε = 7.0%）下得以保持。
