Organic rectifying junctions from an electron-accepting molecular wire and an electron-donating phthalocyanine.
Self-assembled monolayers (SAMs) of arylene-ethynylene oligomers that incorporate electron-accepting 9-fluorenone and 9-[(4-pyridyl)methylene]fluorene units in the backbone exhibit symmetrical current-voltage (I-V) characteristics, but rectifying junctions with current ratios of 20-80 at +/-1 V have been obtained by protonating these wire-like molecules and ionically coupling with anionic donors.
Nanomaterials Group, Cranfield University, Cranfield, UK MK43 0AL. g.j.ashwell@cranfield.ac.uk
Geoffrey J
GJ
Ashwell
Wayne D
WD
Tyrrell
Barbara
B
Urasinska
Changsheng
C
Wang
Martin R
MR
Bryce