Emergent Properties of an Organic Semiconductor Driven by its Molecular Chirality

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Title: Emergent Properties of an Organic Semiconductor Driven by its Molecular Chirality
Author(s): Yang, Y
Rice, B
Shi, X
Brandt, JR
Correa da Costa, R
Hedley, GJ
Smilgies, D-M
Frost, JM
Samuel, IDW
Otero-de-la-Roza, A
Johnson, ER
Jelfs, KE
Nelson, J
Campbell, AJ
Fuchter, MJ
Item Type: Journal Article
Abstract: Chiral molecules exist as pairs of nonsuperimposable mirror images; a fundamental symmetry property vastly underexplored in organic electronic devices. Here, we show that organic field-effect transistors (OFETs) made from the helically chiral molecule 1-aza[6]helicene can display up to an 80-fold difference in hole mobility, together with differences in thin-film photophysics and morphology, solely depending on whether a single handedness or a 1:1 mixture of left- and right-handed molecules is employed under analogous fabrication conditions. As the molecular properties of either mirror image isomer are identical, these changes must be a result of the different bulk packing induced by chiral composition. Such underlying structures are investigated using crystal structure prediction, a computational methodology rarely applied to molecular materials, and linked to the difference in charge transport. These results illustrate that chirality may be used as a key tuning parameter in future device applications.
Publication Date: 11-Jul-2017
Date of Acceptance: 11-Jul-2017
URI: http://hdl.handle.net/10044/1/51780
DOI: https://dx.doi.org/10.1021/acsnano.7b03540
ISSN: 1936-0851
Publisher: American Chemical Society
Start Page: 8329
End Page: 8338
Journal / Book Title: ACS Nano
Volume: 11
Issue: 8
Copyright Statement: © 2017 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Nano, after peer review and technical editing by the publisher. To access the final edited and published work see https://dx.doi.org/10.1021/acsnano.7b03540
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/i014535/1
EP/L014580/1
EP/M025020/1
EP/P000525/1
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Chemistry
Science & Technology - Other Topics
Materials Science
chirality
organic semiconductor
helicene
self-assembling circular polarization
structure prediction
CRYSTAL-STRUCTURE PREDICTION
CIRCULARLY-POLARIZED ELECTROLUMINESCENCE
FILMS
ENANTIOPURE
BEHAVIOR
LIGHT
SPIN
CRYSTALLIZATION
PHOTOVOLTAICS
HELICENES
chirality
circular polarization
helicene
organic semiconductor
self-assembling
structure prediction
MD Multidisciplinary
Nanoscience & Nanotechnology
Publication Status: Published
Embargo Date: 2018-07-11
Appears in Collections:Physics
Chemistry
Experimental Solid State
Centre for Environmental Policy
Faculty of Natural Sciences



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