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Chain-Assisted Charge Transport in Semicrystalline Conjugated Polymers

Title data

Conchuir, B. O. ; Tarantini, C. ; McNeill, Christopher R. ; Hüttner, Sven ; Zaccone, A.:
Chain-Assisted Charge Transport in Semicrystalline Conjugated Polymers.
In: The Journal of Physical Chemistry C. Vol. 120 (2016) Issue 27 . - pp. 14539-14548.
ISSN 1932-7455
DOI: https://doi.org/10.1021/acs.jpcc.6b04714

Official URL: Volltext

Abstract in another language

Charge-carrier transport in a paradigmatic semicrystalline polymer semiconductor (P3HT) is important for both fundamental understanding and applications. In samples with enhanced structural disorder due to ad-hoc point defects, the mobility displays rich behavior as a function of electric field (F) and temperature (T). At low T, the mobility increases with the applied field, but upon further increasing T, the field-dependence becomes shallower. Eventually, at the highest T considered, the slope changes sign and the mobility then decreases with the field. This phenomenon can be interpreted with our model as a result of the competition between intrachain conductive-like transport (which slows on increasing F) and interchain activated transport (which is faster at higher F). The former is controlling at high T where interchain hops are strictly limited to nearest-neighbor monomers on adjacent chains. At low T, instead, interchain hops to distant sites are allowed and control the positive correlation of the mobility with the field.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Junior Professorship Solar Energy > Junior Professorship Solar Energy - Juniorprof. Dr. Sven Hüttner
Profile Fields > Advanced Fields > Polymer and Colloid Science
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Junior Professorship Solar Energy
Profile Fields
Profile Fields > Advanced Fields
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
500 Science > 540 Chemistry
Date Deposited: 12 Jan 2018 10:50
Last Modified: 12 Apr 2018 11:18
URI: https://eref.uni-bayreuth.de/id/eprint/41719