Intrinsically stretchable fully π-conjugated polymers with inter-aggregate capillary interaction for deep-blue flexible inkjet-printed light-emitting diodes

作者：Mingjian Ni, Zhiqiang Zhuo, Bin Liu, Han Xu, Jing Yang, Lili Sun, Yuekuan Yang, Jiangli Cai, Xiang An, Lubing Bai, Man Xu, Jinyi Lin, Quanyou Feng, Guohua Xie, Yutong Wu, Wei Huang · 发表于：Nature Communications · 年份：2025 · DOI：10.1038/s41467-024-55494-2 · 被引用次数：30 · 研究领域：Advanced Sensor and Energy Harvesting Materials、Nanomaterials and Printing Technologies、Organic Electronics and Photovoltaics

Fully π-conjugated polymers consisting of plane and rigid aromatic units present a fantastic optoelectronic property, a promising candidate for printed and flexible optoelectronic devices. However, obtaining high-performance conjugated polymers with an excellent intrinsically flexible and printable capacity is a great challenge due to their inherent coffee-ring effect and brittle properties. Here, we report an asymmetric substitution strategy to improve the printable and stretchable properties of deep-blue light-emitting conjugated polymers with a strong inter-aggregate capillary interaction for flexible printed polymer light-emitting diodes. The loose rod-shaped stacking of asymmetric conjugated polymers chain in the precursor printed ink makes it easier to improve the intrinsic stretchability of inkjet-printed films. More interestingly, the anisotropic shape rod-like aggregate of conjugated polymers chains also induced a strong capillary interaction and further suppressed the coffee-ring effect, which is more likely to allow for uniform deposition during printed processing and form uniform printed films. Achieving high-performance conjugated polymers with intrinsic flexibility and printable capacity is a great challenge. Here, the authors report asymmetric substituted polymers with strong inter aggregate capillary interaction for deep-blue flexible printed polymer light-emitting diodes.