Photo-Electronic Hybrids Research Center , Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea.
ACS Appl Mater Interfaces. 2018 Aug 22;10(33):28027-28035. doi: 10.1021/acsami.8b07287. Epub 2018 Aug 9.
Here, we report on a highly conductive, stretchable, and transparent electrode of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) fabricated via modification with triblock copolymer, poly(ethylene glycol)- block-poly(propylene glycol)- block-poly(ethylene glycol) (PEO-PPO-PEO, Pluronic P123), and post-treatment with sulfuric acid. The fabricated electrode exhibits high transparency (89%), high electrical conductivity (∼1700 S/cm), and minimal change in resistance (∼4%) under repetitive stretch-release cycles at 40% tensile strain after stabilization. P123 acts as a secondary dopant and plasticizer, resulting in enhanced electrical conductivity and stretchability of PEDOT:PSS. Furthermore, after sulfuric acid post-treatment, P123 helps the electrode to maintain its stretchability. A successful demonstration of the stretchable interconnection was shown by stretching the P123-modified PEDOT:PSS electrodes, which were connected with light-emitting diodes (LEDs) in series. Finally, a stretchable and transparent touch sensor consisting of our fabricated electrodes and an LED array and stretchable semitransparent supercapacitor were presented, suggesting a great potential of our electrodes in the application to various deformable devices.
在这里，我们报告了一种通过三嵌段共聚物聚乙二醇-嵌段-聚丙二醇-嵌段-聚乙二醇（PEO-PPO-PEO，Pluronic P123）修饰和硫酸后处理制备的具有高导电性、可拉伸性和透明性的聚（3,4-亚乙基二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT:PSS）的可拉伸透明电极。所制备的电极在 40%拉伸应变下经过重复拉伸-释放循环后具有 89%的高透明度、∼1700 S/cm 的高电导率和∼4%的低电阻变化率。P123 充当二次掺杂剂和增塑剂，从而提高了 PEDOT:PSS 的电导率和可拉伸性。此外，经过硫酸后处理后，P123 有助于电极保持其可拉伸性。通过拉伸连接有串联发光二极管（LED）的 P123 改性 PEDOT:PSS 电极，成功地展示了可拉伸的互连。最后，展示了由我们制备的电极和 LED 阵列以及可拉伸半透明超级电容器组成的可拉伸透明触摸传感器，表明我们的电极在各种可变形设备中的应用具有很大的潜力。
