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Effect of Alkyl Chain Branching Point on 3D Crystallinity in High N‐Type Mobility Indolonaphthyridine Polymers |
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| Authors: | Kealan J. Fallon Annikki Santala Nilushi Wijeyasinghe Eric F. Manley Niall Goodeal Anastasia Leventis David M. E. Freeman Mohammed Al‐Hashimi Lin X. Chen Tobin J. Marks Thomas D. Anthopoulos Hugo Bronstein |
| Affiliation: | 1. Department of Chemistry, University College London, London, UK;2. Centre for Plastic Electronics, Imperial College London, London, UK;3. Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, USA;4. Department of Chemistry, Materials Research Center and Argonne‐Northwestern Solar Energy Research Center, Northwestern University, Evanston, IL, USA;5. Department of Chemistry, Texas A&M University at Qatar, Doha, Qatar |
| Abstract: | Herein, this study investigates the impact of branching‐point‐extended alkyl chains on the charge transport properties of three ultrahigh n‐type mobility conjugated polymers. Using grazing incidence wide‐angle X‐ray scattering, analysis of the crystallinity of the series shows that while π–π interactions are increased for all three polymers as expected, the impact of the side‐chain engineering on polymer backbone crystallinity is unique to each polymer and correlates to the observed changes in charge transport. With the three polymers exhibiting n‐type mobilities between 0.63 and 1.04 cm2 V?1 s?1, these results ratify that the indolonaphthyridine building block has an unprecedented intrinsic ability to furnish high‐performance n‐type organic semiconductors. |
| Keywords: | conjugated polymers electron transport indolonapthryidine Organic Field‐Effect Transistors (OFETs) polymer crystallinity |