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Effect of Alkyl Chain Branching Point on 3D Crystallinity in High N‐Type Mobility Indolonaphthyridine Polymers
Author(s) -
Fallon Kealan J.,
Santala Annikki,
Wijeyasinghe Nilushi,
Manley Eric F.,
Goodeal Niall,
Leventis Anastasia,
Freeman David M. E.,
AlHashimi Mohammed,
Chen Lin X.,
Marks Tobin J.,
Anthopoulos Thomas D.,
Bronstein Hugo
Publication year - 2017
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201704069
Subject(s) - crystallinity , branching (polymer chemistry) , materials science , polymer , alkyl , conjugated system , polymer chemistry , chemical physics , scattering , chemical engineering , organic chemistry , composite material , chemistry , optics , physics , engineering
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 cm 2 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.