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Issue 18, 2016
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Improved electron transport properties of n-type naphthalenediimide polymers through refined molecular ordering and orientation induced by processing solvents

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Abstract

To determine the role played by the choice of processing solvents in governing the photophysics, microstructure, and charge carrier transport in naphthalenediimide (NDI)-based polymers, we have prepared two new NDI-bithiophene (T2)- and NDI-thienothiophene (TTh)-containing polymers with hybrid siloxane pentyl chains (SiC5) (P(NDI2SiC5-T2) and P(NDI2SiC5-TTh)). Among the various processing solvents studied here, the films prepared using chloroform exhibited far better electron mobilities (0.16 ± 0.1–0.21 ± 0.05 cm2 V−1 s−1) than the corresponding samples prepared from different solvents, exceeding one order of magnitude higher, indicating the significant influence of the processing solvent on the charge transport. Upon thin-film analysis using atomic force microscopy and grazing incidence X-ray diffraction, we discovered that molecular ordering and orientation are affected by the choice of the processing solvent, which is responsible for the change in the transport characteristics of this class of polymers.

Graphical abstract: Improved electron transport properties of n-type naphthalenediimide polymers through refined molecular ordering and orientation induced by processing solvents

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Publication details

The article was received on 26 Feb 2016, accepted on 23 Mar 2016 and first published on 24 Mar 2016


Article type: Paper
DOI: 10.1039/C6CP01314G
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Phys. Chem. Chem. Phys., 2016,18, 12486-12493

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    Improved electron transport properties of n-type naphthalenediimide polymers through refined molecular ordering and orientation induced by processing solvents

    Y. An, D. X. Long, Y. Kim, Y. Noh and C. Yang, Phys. Chem. Chem. Phys., 2016, 18, 12486
    DOI: 10.1039/C6CP01314G

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