A Holistic Review of C = C Crosslinkable Conjugated Molecules in Solution-Processed Organic Electronics: Insights into Stability, Processibility, and Mechanical Properties.

Solution-processable organic conjugated molecules (OCMs) consisted of a series of aromatic units linked by σ-bonds, which present a relatively freedom intramolecular motion and intermolecular re-arrangement under external stimulation. These are influence on the chem-physic, photophysic and electrical property. Cross-linked strategy provided an effective platform to obtain OCMs network, which allow for outstanding optoelectronic, excellent chem-physic property and substantial improvement in device fabrication. Unsaturated double carbon-carbon bond (C = C) is a universal segment to construct crosslinkable OCMs. In this review, we will set C = C cross-linkable units as an example to summarize the development of cross-linkable OCMs for solution-processable optoelectronic applications. First, this review provides a comprehensive of overview of the distinctive chemical, physical, and optoelectronic properties arising from the cross-linking strategies employed in OCMs. Second, the methods for probing the C = C cross-linking reaction also emphasized based on the perturbations of chemical structure and chem-physic property. Third, a series of model C = C cross-linkable units, including styrene, trifluoroethylene, unsaturated acid ester, are further discussed to design and prepare novel OCMs. Furthermore, we present a concise overview of the optoelectronic applications associated with this approach, including light-emitting diodes (LEDs), solar cells (SCs), and field-effect transistors (FETs). Lastly, we offer a concluding perspective and outlook for the improvement of OCMs and their optoelectronic application via cross-linking strategy. This article is protected by copyright. All rights reserved.