Details

Autor(en) / Beteiligte

• Yang, Ying
• Rice, Beth
• Shi, Xingyuan
• Brandt, Jochen R
• Correa da Costa, Rosenildo
• Hedley, Gordon J
• Smilgies, Detlef-M
• Frost, Jarvist M
• Samuel, Ifor. D. W
• Otero-de-la-Roza, Alberto
• Johnson, Erin R
• Jelfs, Kim E
• Nelson, Jenny
• Campbell, Alasdair J
• Fuchter, Matthew J

Titel

Emergent Properties of an Organic Semiconductor Driven by its Molecular Chirality

Ist Teil von

• ACS nano, 2017-08, Vol.11 (8), p.8329-8338

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2017

Quelle

MEDLINE

Beschreibungen/Notizen

• 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.