Exploring the Frontiers of Polymer Science and Technology: From Fundamentals to Applications (English)
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Development and Fabrication of Photopolymerizable Coronene Derivatives: Controlling Planar Alignment on Solid Substrates for Organic Electronics Applications
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Enhancing charge transport in planar hexa-peri-hexabenzocoronene (HBC) derivatives is critical for advancing organic electronics. HBC derivatives have demonstrated exceptional charge transport and anisotropic photoresponse in forming discotic columnar liquid crystalline (DCLC) phases. However, their noncovalent molecular assemblies are prone to disassembly when exposed to heat or organic solvents. To overcome this challenge, we developed a novel approach by designing a series of cross-linkable coronene derivatives. These derivatives are equipped with diacetylene-containing side chains that act as tethers, linking the HBC core. The presence of diacetylene units enables aggregation and subsequent polymerization/cross-linking reactions in both film and solution states. Notably, UV-irradiation or thermal treatment facilitates the formation of a robust and stable charge-conduction channel. With this enhanced charge transport capability, we fabricated molecularly aligned films on different substrates using bar-coating methods. These films exhibit edge-on orientation, further enhancing their efficient charge transport characteristics. In conclusion, the integration of cross-linkable coronene derivatives represents a promising approach to improve charge transport in organic electronics. This advancement holds potential for applications in thin-film transistors technology.