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Title: | On the Importance of Chemical Precision in Organic Electronics: Fullerene Intercalation in Perfectly Alternating Conjugated Polymers | Authors: | VANDERSPIKKEN, Jochen Liu, Zhen Wu, Xiaocui BECKERS, Omar Moro, Stefania Quill, Tyler James LIU, Quan GOOSSENS, Arwin Marks, Adam Weaver, Karrie Hamid, Mouna Goderis, Bart Nies, Erik Lemaur, Vincent Beljonne, David Salleo, Alberto LUTSEN, Laurence VANDEWAL, Koen Van Mele, Bruno Costantini, Giovanni Van den Brande, Niko MAES, Wouter |
Issue Date: | 2023 | Publisher: | Source: | ADVANCED FUNCTIONAL MATERIALS, (Art N° 2309403) | Status: | Early view | Abstract: | The true structure of alternating conjugated polymers-the state-of-the-art materials for many organic electronics-often deviates from the idealized picture. Homocoupling defects are in fact inherent to the widely used cross-coupling polymerization methods. Nevertheless, many polymers still perform excellently in the envisaged applications, which raises the question if one should really care about these imperfections. This article looks at the relevance of chemical precision (and lack thereof) in conjugated polymers covering the entire spectrum from the molecular scale, to the micro and mesostructure, up to the device level. The different types of polymerization errors for the alkoxylated variant of the benchmark (semi)crystalline polymer poly[2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene (PBTTT) are identified, visualized, and quantified and a general strategy to avoid homocoupling is introduced. Through a combination of experiments and supported by simulations, it is shown that these coupling defects hinder fullerene intercalation and limit device performance as compared to the homocoupling-free analog. This clearly demonstrates that structural defects do matter and should be generally avoided, in particular when the geometrical regularity of the polymer is essential. These insights likely go beyond the specific PBTTT derivatives studied here and are of general relevance for the wider organic electronics field. | Notes: | Van den Brande, N; Maes, W (corresponding author), IMEC, Associated Lab IMOMEC, Wetenschapspk 1, B-3590 Diepenbeek, Belgium.; Maes, W (corresponding author), Energyville, Thorpk, BE-3600 Genk, Belgium.; Van den Brande, N (corresponding author), Vrije Univ Brussel, Phys Chem & Polymer Sci FYSC, Pl laan 2, B-1050 Brussels, Belgium.; Costantini, G (corresponding author), Univ Birmingham, Sch Chem, Birmingham B15 2TT, England. g.costantini@bham.ac.uk; niko.van.den.brande@vub.be; |
Keywords: | homocoupling;intermolecular charge-transfer absorption;polymer:fullerene co-crystals;Stille cross-coupling;structural defect quantification | Document URI: | http://hdl.handle.net/1942/41414 | ISSN: | 1616-301X | e-ISSN: | 1616-3028 | DOI: | 10.1002/adfm.202309403 | ISI #: | 001064802500001 | Rights: | 2023 The Authors. Advanced Functional Materials published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
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File | Description | Size | Format | |
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Adv Funct Materials - 2023 - Vanderspikken.pdf | Published version | 2.56 MB | Adobe PDF | View/Open |
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