Correlation between Morphology, Mechanics, and Electricity of PEDOT:PSS-Based Stretchable Electrodes Fabricated by the Prestrain Transfer Method

作者：Liang Zheng, Xiaoliang Li, Pengyan Luan, Zhenxin Yang, J. Su, Xuanhe Li, Fushun Li, Dongming Zhang, Jinquan Huang, Haikun Zhu, Dengke Wang, Zheng‐Hong Lu, Qiang Zhu · 发表于：ACS Applied Electronic Materials · 年份：2024 · DOI：10.1021/acsaelm.4c00220 · 被引用次数：5 · 研究领域：Advanced Sensor and Energy Harvesting Materials、Conducting polymers and applications、Tactile and Sensory Interactions

The recent advancement of stretchable photoelectronics has catalyzed revolutionary transformations in various cutting-edge fields. However, the stretchable transparent electrodes (STEs), which are vital components ensuring signal conduction in stretchable photoelectronics, pose a challenge due to the rigid and fragile nature of conventional conductive materials. In this study, we demonstrated a prestrain transfer technique for fabricating STEs using PEDOT:PSS. The resulting STEs achieved a sheet resistance of approximately 50 Ω/sq by leveraging the benefits of methanesulfonic acid treatment and incorporating a carbon-nanotube blend in PEDOT:PSS. The fabricated STEs exhibited exceptional transparency exceeding 90% and remarkable stability over 1000 stretching cycles without degradation in conductance. An in situ investigation was conducted to visualize the deformation of the PEDOT:PSS film and its association with the electrical ductility of the STEs. The prestrain transfer was found to induce kirigami-type cracks and out-of-plane microwrinkles in the PEDOT:PSS film. These structures effectively alleviate stress concentration and compensate for strain during stretching loading, thereby imparting enhanced stretchability and electrical ductility to the STEs. However, once the stretching strain exceeded the prestrain threshold, numerous microcracks emerged on the PEDOT:PSS film, leading to electrical failure of the STEs due to a significant rise in resistance. The incorporation o...