Lee Junwoo, Bark Hyunwoo, Xue Yazhen, Lee Pooi See, Zhong Mingjiang
Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06520, USA.
School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.
Angew Chem Int Ed Engl. 2023 Oct 9;62(41):e202306994. doi: 10.1002/anie.202306994. Epub 2023 Aug 31.
Mechanically compliant conductors are of utmost importance for the emerging fields of soft electronics and robotics. However, the development of intrinsically deformable organic conductors remains a challenge due to the trade-off between mechanical performance and charge mobility. In this study, we report a solution to this issue based on size-selective ionic crosslinking. This rationally designed crosslinking mediated by length-regulated oligo(ethylene glycol) pendant groups and metal ions simultaneously improved the softness and toughness and ensured excellent mixed ionic-electronic conductivity in poly(3,4-ethylenedioxythiophene):polystyrene sulfonate composite materials. Moreover, the added ions remarkably promoted accumulation of charge carriers in response to temperature gradient, thus offering a viable approach to stretchable thermoelectric generators with enhanced stability against humidity.
机械柔顺导体对于软电子学和机器人技术等新兴领域至关重要。然而，由于机械性能和电荷迁移率之间的权衡，本征可变形有机导体的开发仍然是一个挑战。在本研究中，我们报告了一种基于尺寸选择性离子交联的解决方案。这种由长度调节的聚乙二醇侧基和金属离子介导的合理设计的交联同时提高了柔软性和韧性，并确保了聚（3,4-亚乙基二氧噻吩）：聚苯乙烯磺酸盐复合材料具有优异的混合离子-电子导电性。此外，添加的离子显著促进了电荷载流子响应温度梯度的积累，从而为具有增强的防潮稳定性的可拉伸热电发电机提供了一种可行的方法。
