Self-Assembled PCBM Nanosheets: A Facile Route to
Electronic Layer-on-Layer Heterostructures
Version 2 2018-02-22, 05:31
Version 1 2018-01-30, 13:04
Posted on 2018-02-22 - 05:31
We
report on the self-assembly of semicrystalline [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) nanosheets at the interface
between a hydrophobic solvent and water, and utilize this opportunity
for the realization of electronically active organic/organic molecular
heterostructures. The self-assembled PCBM nanosheets can feature a
lateral size of >1 cm2 and be transferred from the water
surface to both hydrophobic and hydrophilic surfaces using facile
transfer techniques. We employ a transferred single PCBM nanosheet
as the active material in a field-effect transistor (FET) and verify
semiconductor function by a measured electron mobility of 1.2 ×
10–2 cm2 V–1 s–1 and an on–off ratio of ∼1 × 104. We further fabricate a planar organic/organic heterostructure
with the p-type organic semiconductor poly(3-hexylthiophene-2,5-diyl)
as the bottom layer and the n-type PCBM nanosheet as the top layer
and demonstrate ambipolar FET operation with an electron mobility
of 8.7 × 10–4 cm2 V–1 s–1 and a hole mobility of 3.1 × 10–4 cm2 V–1 s–1.
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Barzegar, Hamid
Reza; Larsen, Christian; Boulanger, Nicolas; Zettl, Alex; Edman, Ludvig; Wågberg, Thomas (2018). Self-Assembled PCBM Nanosheets: A Facile Route to
Electronic Layer-on-Layer Heterostructures. ACS Publications. Collection. https://doi.org/10.1021/acs.nanolett.7b05205
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AUTHORS (6)
HB
Hamid
Reza Barzegar
CL
Christian Larsen
NB
Nicolas Boulanger
AZ
Alex Zettl
LE
Ludvig Edman
TW
Thomas Wågberg