Conjugated polymer fibers can be used to manufacture various soft fibrous optoelectronic devices, significantly advancing wearable devices and smart textiles. Recently, conjugated polymer-based fibrous electronic devices have been widely used in energy conversion, electrochemical sensing, and human-machine interaction. However, the insufficient mechanical properties of conjugated polymer fibers, the difficulty in solution processing semiconductors with rigid main chains, and the challenges in large-scale continuous production have limited their further development in the wearable field. We regulated the pi - pi stacking interactions in conjugated polymer molecules below their critical liquid crystal concentration by applying fluid shear stress. We implemented secondary orientation, leading to the continuous fabrication of anisotropic semiconductor fibers. This strategy enables conjugated polymers with rigid backbones to synergistically enhance the mechanical and semiconductor properties of fibers through liquid crystal spinning. Furthermore, conjugated polymer fibers, exhibiting excellent electrochemical performance and high mechanical strength (600 MPa) that essentially meet the requirements for industrialized preparation, maintain stability under extreme temperatures, radiation, and chemical reagents. Lastly, we have demonstrated logic circuits using semiconductor fiber organic electrochemical transistors, showcasing its application potential in the field of wearable fabric-style logic processing. These findings confirm the importance of the liquid crystalline state and solution control in optimizing the performance of conjugated polymer fibers, thus paving the way for developing a new generation of soft fiber semiconductor devices.
InSpecLearn4SDL: Interpretable Spectral Features Predict Conductivity in Self-Driving Doped Conjugated Polymer Labs
Department of Mechanical Engineering, Iowa State University, Ames, IA, 50010, USA（机械工程系，爱荷华州立大学）；Department of Materials Science（材料科学系）；ORaCEL, North Carolina State University, Raleigh, NC, 27606, USA（ORaCEL，北卡罗来纳州立大学）
A salt water battery with high stability and charging rates made from solution processed conjugated polymers with polar side chains
我们报道了一种中性盐水基电池，其使用p型和n型溶液处理的聚合物膜作为电池的阴极和阳极。通过在p型和n型聚合物中形成双极化子来实现电极的比容量（约30 mAh cm-3）。通过工程化乙二醇和两性离子基侧链连接到聚合物主链上，我们促进了快速离子传输通过无孔聚合物膜。这与通过共轭聚合物主链的电子电荷的有效传输相结合，允许膜在高充电和放电速率（>1000 C-速率）下保持恒定的容量。电极在电化学循环过程中也显示出良好的稳定性（在>1000次循环中容量下降小于30%）和高达1.4V的输出电压。这些具有极性侧链的半导体聚合物的性能证明了这种材料类别用于快速充电、水基电化学能量存储装置的潜力。
Heterogeneous dynamics in a polymer solution revealed through measurement of ultraslow convection
University of Colorado, Boulder（科罗拉多大学博尔德分校）；Brookhaven National Laboratory（布鲁克海文国家实验室）；ESRF - The European Synchrotron（欧洲同步辐射装置）；Forschungszentrum Jülich（于利希研究中心）；RWTH Aachen University（亚琛工业大学）；Argonne National Laboratory（阿贡国家实验室）；Paderborn University（帕德博恩大学）；Stanford University（斯坦福大学）
Fine-tuning the Microstructure and Photophysical Characteristics of Fluorescent Conjugated Copolymers Using Photoalignment and Liquid-crystalline Ordering
