Yi Wan, Hao-Tian Yuan, Qianwei Xu, Fang Liu, Nianlong Cai, Qian Xue, Xiang-Chun Li* and Wen-Yong Lai*,
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Intrinsically Stretchable Electroluminescent Elastomers Based on Fully Conjugated Backbones for Organic Light-Emitting Diodes
Stretchable organic light-emitting diodes (OLEDs) are capable of withstanding prolonged deformation, representing a significant direction for advancement within the field of flexible and stretchable electronics. Intrinsically stretchable electroluminescent elastomers (ISEEs) are essential for achieving stretchability in OLEDs. Nonetheless, currently available electroluminescent polymers based on nonconjugated backbones modulated by soft chains often struggle to maintain the optoelectronic performance of the devices. Herein, we proposed a molecular design strategy to balance the optoelectronic performance and stretchability by the soft-chain modulation of fully conjugated polymer backbones. The resulting elastomers exhibit a tensile elongation of 166% and a yield strength of 0.34 MPa. When employed as the emitting layer in OLEDs, the device demonstrated a low turn-on voltage of 5 V. The results suggest an effective molecular design strategy for flexible and stretchable electronics.
期刊介绍：
Macromolecules publishes original, fundamental, and impactful research on all aspects of polymer science. Topics of interest include synthesis (e.g., controlled polymerizations, polymerization catalysis, post polymerization modification, new monomer structures and polymer architectures, and polymerization mechanisms/kinetics analysis); phase behavior, thermodynamics, dynamic, and ordering/disordering phenomena (e.g., self-assembly, gelation, crystallization, solution/melt/solid-state characteristics); structure and properties (e.g., mechanical and rheological properties, surface/interfacial characteristics, electronic and transport properties); new state of the art characterization (e.g., spectroscopy, scattering, microscopy, rheology), simulation (e.g., Monte Carlo, molecular dynamics, multi-scale/coarse-grained modeling), and theoretical methods. Renewable/sustainable polymers, polymer networks, responsive polymers, electro-, magneto- and opto-active macromolecules, inorganic polymers, charge-transporting polymers (ion-containing, semiconducting, and conducting), nanostructured polymers, and polymer composites are also of interest. Typical papers published in Macromolecules showcase important and innovative concepts, experimental methods/observations, and theoretical/computational approaches that demonstrate a fundamental advance in the understanding of polymers.
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