Title
Charge transport in high-performance ink-jet printed single-droplet organic transistors based on a silylethynyl substituted pentacene/insulating polymer blend
Author
Li, X.
Smaal, W.T.T.
Kjellander, C.
van der Putten, B.
Gualandris, K.
Smits, E.C.P.
Anthony, J.
Broer, D.J.
Blom, P.W.M.
Genoe, J.
Gelinck, G.H.
Publication year
2011
Abstract
We present a systematic study of the influence of material composition and ink-jet processing conditions on the charge transport in bottom-gate field-effect transistors based on blends of 6,13-bis(triisopropyl-silylethynyl) pentacene (TIPS-PEN) and polystyrene. After careful process optimizations of blending ratio and printing temperature we routinely can make transistors with an average mobility of 1 cm2/Vs (maximum value 1.5 cm 2/Vs), on/off ratio exceeding 107, and sharp turn-on in current (sub-threshold slopes approaching 60 mV/decade). These characteristics are superior to the TIPS-PEN only transistors. Using channel scaling measurements and scanning Kelvin probe microscopy, the sharp turn-on in current in the blends is attributed to a contact resistance that originates from a thin insulating layer between the injecting contacts and the semiconductor channel. © 2011 Elsevier B.V. All rights reserved.
Subject
Mechatronics, Mechanics & Materials
HOL - Holst
TS - Technical Sciences
Electronics
Industrial Innovation
Blend
Contact barrier
Organic transistor
Single-droplet ink-jet printing
Substituted pentacene
Average mobility
Blend
Blending ratio
Contact barrier
Ink-jet
Material compositions
Maximum values
On/off ratio
Organic transistor
Pentacenes
Processing condition
Scanning Kelvin probe microscopy
Semiconductor channels
Subthreshold
Systematic study
Thin insulating layers
Blending
Drops
Ink
Organic field effect transistors
Polymer blends
Polystyrenes
Transistors
Ink jet printing
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http://resolver.tudelft.nl/uuid:0ba68a8d-f5a2-4109-aa2d-107fda08ec53
TNO identifier
445746
ISSN
1566-1199
Source
Organic Electronics: physics, materials, applications, 12 (8), 1319-1327
Document type
article