The Effects of Crystallinity on Charge Transport and the Structure of Sequentially Processed F 4 TCNQ‐Doped Conjugated Polymer Films
Abstract
Abstract The properties of molecularly doped films of conjugated polymers are explored as the crystallinity of the polymer is systematically varied. Solution sequential processing (SqP) was used to introduce 2,3,5,6‐tetrafluoro‐7,7,8,8‐tetracyanoquinodimethane (F 4 TCNQ) into poly(3‐hexylthiophene‐2,5‐diyl) (P3HT) while preserving the pristine polymer's degree of crystallinity. X‐ray data suggest that F 4 TCNQ anions reside primarily in the amorphous regions of the film as well as in the P3HT lamellae between the side chains, but do not π‐stack within the polymer crystallites. Optical spectroscopy shows that the polaron absorption redshifts with increasing polymer crystallinity and increases in cross section. Theoretical modeling suggests that the polaron spectrum is inhomogeneously broadened by the presence of the anions, which reside on average 6–8 Å from the polymer backbone. Electrical measurements show that the conductivity of P3HT films doped by F 4 TCNQ via SqP can be improved by increasing the polymer crystallinity. AC magnetic field Hall measurements show that the increased conductivity results from improved mobility of the carriers with increasing crystallinity, reaching over 0.1 cm 2 V −1 s −1 in the most crystalline P3HT samples. Temperature‐dependent conductivity measurements show that polaron mobility in SqP‐doped P3HT is still dominated by hopping transport, but thatmore »
- Authors:
-
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095‐1569 USA
- Lake Shore Cryotronics Westerville OH 43082 USA
- Materials Science and Engineering Department University of Washington Seattle WA 98195‐2120 USA
- Department of Chemistry Temple University Philadelphia PA 19122 USA
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095‐1569 USA, Department of Materials Science and Engineering University of California, Los Angeles Los Angeles CA 90095 USA, California NanoSystems Institute University of California, Los Angeles Los Angeles CA 90095 USA
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095‐1569 USA, California NanoSystems Institute University of California, Los Angeles Los Angeles CA 90095 USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1395403
- Grant/Contract Number:
- DE‐AC02‐76SF00515
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Advanced Functional Materials
- Additional Journal Information:
- Journal Name: Advanced Functional Materials Journal Volume: 27 Journal Issue: 44; Journal ID: ISSN 1616-301X
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
Citation Formats
Scholes, D. Tyler, Yee, Patrick Y., Lindemuth, Jeffrey R., Kang, Hyeyeon, Onorato, Jonathan, Ghosh, Raja, Luscombe, Christine K., Spano, Frank C., Tolbert, Sarah H., and Schwartz, Benjamin J. The Effects of Crystallinity on Charge Transport and the Structure of Sequentially Processed F 4 TCNQ‐Doped Conjugated Polymer Films. Germany: N. p., 2017.
Web. doi:10.1002/adfm.201702654.
Scholes, D. Tyler, Yee, Patrick Y., Lindemuth, Jeffrey R., Kang, Hyeyeon, Onorato, Jonathan, Ghosh, Raja, Luscombe, Christine K., Spano, Frank C., Tolbert, Sarah H., & Schwartz, Benjamin J. The Effects of Crystallinity on Charge Transport and the Structure of Sequentially Processed F 4 TCNQ‐Doped Conjugated Polymer Films. Germany. https://doi.org/10.1002/adfm.201702654
Scholes, D. Tyler, Yee, Patrick Y., Lindemuth, Jeffrey R., Kang, Hyeyeon, Onorato, Jonathan, Ghosh, Raja, Luscombe, Christine K., Spano, Frank C., Tolbert, Sarah H., and Schwartz, Benjamin J. Wed .
"The Effects of Crystallinity on Charge Transport and the Structure of Sequentially Processed F 4 TCNQ‐Doped Conjugated Polymer Films". Germany. https://doi.org/10.1002/adfm.201702654.
@article{osti_1395403,
title = {The Effects of Crystallinity on Charge Transport and the Structure of Sequentially Processed F 4 TCNQ‐Doped Conjugated Polymer Films},
author = {Scholes, D. Tyler and Yee, Patrick Y. and Lindemuth, Jeffrey R. and Kang, Hyeyeon and Onorato, Jonathan and Ghosh, Raja and Luscombe, Christine K. and Spano, Frank C. and Tolbert, Sarah H. and Schwartz, Benjamin J.},
abstractNote = {Abstract The properties of molecularly doped films of conjugated polymers are explored as the crystallinity of the polymer is systematically varied. Solution sequential processing (SqP) was used to introduce 2,3,5,6‐tetrafluoro‐7,7,8,8‐tetracyanoquinodimethane (F 4 TCNQ) into poly(3‐hexylthiophene‐2,5‐diyl) (P3HT) while preserving the pristine polymer's degree of crystallinity. X‐ray data suggest that F 4 TCNQ anions reside primarily in the amorphous regions of the film as well as in the P3HT lamellae between the side chains, but do not π‐stack within the polymer crystallites. Optical spectroscopy shows that the polaron absorption redshifts with increasing polymer crystallinity and increases in cross section. Theoretical modeling suggests that the polaron spectrum is inhomogeneously broadened by the presence of the anions, which reside on average 6–8 Å from the polymer backbone. Electrical measurements show that the conductivity of P3HT films doped by F 4 TCNQ via SqP can be improved by increasing the polymer crystallinity. AC magnetic field Hall measurements show that the increased conductivity results from improved mobility of the carriers with increasing crystallinity, reaching over 0.1 cm 2 V −1 s −1 in the most crystalline P3HT samples. Temperature‐dependent conductivity measurements show that polaron mobility in SqP‐doped P3HT is still dominated by hopping transport, but that more crystalline samples are on the edge of a transition to diffusive transport at room temperature.},
doi = {10.1002/adfm.201702654},
journal = {Advanced Functional Materials},
number = 44,
volume = 27,
place = {Germany},
year = {Wed Sep 27 00:00:00 EDT 2017},
month = {Wed Sep 27 00:00:00 EDT 2017}
}
https://doi.org/10.1002/adfm.201702654
Web of Science
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