Zhuo Zhiqiang, Ni Mingjian, Yu Ningning, Zheng Yingying, Lin Yingru, Yang Jing, Sun Lili, Wang Lizhi, Bai Lubing, Chen Wenyu, Xu Man, Huo Fengwei, Lin Jinyi, Feng Quanyou, Huang Wei
Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), Nanjing, China.
The Institute of Flexible Electronics (IFE, Future Technologies), Xiamen University, Xiamen, China.
Nat Commun. 2024 Sep 12;15(1):7990. doi: 10.1038/s41467-024-50358-1.
Fully π-conjugated polymers with rigid aromatic units are promising for flexible optoelectronic devices, but their inherent brittleness poses a challenge for achieving high-performance, intrinsically stretchable fully π-conjugated polymer. Here, we are establishing an external-plasticizing strategy using semiconductor fluid plasticizers (Z1 and Z2) to enhance the optoelectronic, morphological, and stretchable properties of fully π-conjugated polymer films for flexible light-emitting diodes. The synergistic effect of hierarchical structure and optoelectronic properties of Z1 in poly(9,9-di-n-octylfluorene-alt-benzothiadiazole) (F8BT) films enable excellent stretchable deformability (~25%) and good conductivity. PLEDs based on F8BT/Z1 films show stable electroluminescence and efficiency under 15% stretch and 100 cycles at 10% strain, revealing outstanding stress tolerance. This strategy is also improving the stretchable properties of polymers like poly(9,9-di-n-octylfluorenyl-2,7-diyl) (PFO) and poly(2-methoxy-5(2'-ethyl)hexoxy-phenylenevinylene) (Super Yellow), demonstrating its general applicability. Therefore, this strategy can provide effective guidance for designing high-performance stretchable fully π-conjugated polymers films for flexible electronic devices.
具有刚性芳香单元的全π共轭聚合物在柔性光电器件方面具有广阔前景，但其固有的脆性对实现高性能、本征可拉伸的全π共轭聚合物构成了挑战。在此，我们正在建立一种使用半导体流体增塑剂（Z1和Z2）的外部增塑策略，以增强用于柔性发光二极管的全π共轭聚合物薄膜的光电、形态和可拉伸性能。Z1在聚（9,9-二正辛基芴-alt-苯并噻二唑）（F8BT）薄膜中的分层结构和光电性能的协同效应使其具有出色的可拉伸变形性（约25%）和良好的导电性。基于F8BT/Z1薄膜的聚合物发光二极管在15%拉伸和10%应变下100次循环时表现出稳定的电致发光和效率，显示出出色的应力耐受性。该策略还改善了聚（9,9-二正辛基芴-2,7-二基）（PFO）和聚（2-甲氧基-5（2'-乙基）己氧基-苯撑乙烯撑）（超黄）等聚合物的可拉伸性能，证明了其普遍适用性。因此，该策略可为设计用于柔性电子器件的高性能可拉伸全π共轭聚合物薄膜提供有效指导。
