Electron Transport with Mobility, μ > 86 cm2/(V s), in a 74 nm Long Polyfluorene

Andrew R Cook; Sadayuki Asaoka; Xiang Li; John R Miller

doi:10.1021/acs.jpclett.8b03185

Electron Transport with Mobility, μ > 86 cm²/(V s), in a 74 nm Long Polyfluorene

J Phys Chem Lett. 2019 Jan 17;10(2):171-175. doi: 10.1021/acs.jpclett.8b03185. Epub 2018 Dec 31.

Authors

Andrew R Cook¹, Sadayuki Asaoka², Xiang Li¹, John R Miller¹

Affiliations

¹ Chemistry Department , Brookhaven National Laboratory , Upton, New York 11973 , United States.
² Department of Materials Science and Engineering , Kyoto Institute of Technology , Matsugasaki, Sakyo-ku, Kyoto 606-8585 , Japan.

PMID: 30554508
DOI: 10.1021/acs.jpclett.8b03185

Abstract

The mobility of charges on conjugated polymers is a fundamentally important feature of these materials, but most fall far short of transport that might lead one to call them "molecular wires". A commonly identified bottleneck is flexible dihedral angles between repeat units. Here we find a very high mobility, μ > 86 cm²/(V s), for electrons attached to polyfluorene polymers in isooctane, despite the presence of varied dihedral angles. The present data suggest that interactions with the surrounding medium may be a principal determinant of charge mobility.