During the past decades, π-conjugated polymers have been studied intensively owing to their potential applications in organic optoelectronic devices, such as polymeric light-emitting diodes, bulk heterojunction solar cells, organic field-effect transistors (OFETs), organic memories, biosensors, and actuators. 1,2 The performance of organic devices is determined not only by the inherent electronic structures of individual polymer chain 3,4 but also by multiscale morphologies that were constructed by the drive of supramolecular interactions or van der Waals' forces. Many efforts have been made to design the controllable welldefined nanostructures or hierarchically ordered assemblies in the field of supramolecular semiconductors and electronics for the high-performance or new functional devices. 5,6 One typical example is that ordered self-organization of polythiophenes dramatically influences the performance of bulk heterojunction photovoltaic cells as well as the mobility of OFETs. 7,8 Lightemitting polyfluorenes (PFs) is another impressive example of polymorphisms, including amorphous phase, semicrystalline (R-) phase and R 0 -phase, β-phase, and nematic liquid crystalline (N-) phase. These abundant phases provide a unique opportunity to study the relationship between phase morphology and device performances. 9-13 For example, PFO thin film containing the β-phase exhibits the excellent spectral stability in PLEDs and the pumped lasers with low threshold. 14-16 In this context, it is of the utmost importance to explore further the unique morphology and phase of π-conjugated polymers, which are based on its unique self-assembly mode and supramolecular interactions. Supramolecular gel is a fascinating state that appears solid-like and yet is composed predominantly of a liquid and a small amount of gelators stabilized by supramolecular interactions with 3D networks. 17-20 Until now, low-molecular-mass organogels (LMOGs) have been applied in a wide range of fields, such as biomimetics, separations, drug delivery, soft templates, and tissue engineering. 21-24 Steroid or lipid units have served as gelators to generate cross-linking points in the 3D networks. 25 In addition, some electronically inactive comb-shaped polymers (isotactic and syndiotactic polystyrene (PS), 26 poly(methyl methacrylate), 27 and polyesters 28 ) have also been found to form gel networks easily owing to their unique helical conformations. However, little attention has been paid to π-conjugated polymers. 29-32 Supramolecular π-conjugated polymer gels (SCPGs) can be served as one kind of semiconducting soft materials with distinguished porous structures that may find applications in nanosensors, 33 mimic-artificial muscle, 34 super capacitor, 35 and lithium battery material. 36 Poly(3-alkylthiophene)-based gels were prepared by quenching xylene solution at 150°C, and its conductivity was improved. 37,38 ABSTRACT: Supramolecular π-conjugated polymer-based gels (SCPGs) are one important kind of semiconducting soft materials. Herein we demonstrate a p...
