TY - JOUR
T1 - Mixed Phases as a Route to Self-Passivation
T2 - Effect of π-Stacking Backbone on the Physical and Electrical Properties of Naphthalenediimide Derivatives
AU - Kumar, Pramod
AU - Gerchikov, Yulia
AU - Tessler, Nir
AU - Eichen, Yoav
N1 - Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/10/13
Y1 - 2016/10/13
N2 - Solution processable p- and n-type organic semiconductors are candidates for low-cost, large-area, and roll-to-roll printing of inexpensive mass-production electronics. In these organic semiconductors, it is the π-conjugated backbone that plays the major role in charge-carrier transport across the channel. In order to achieve better device performance, it is required to have better packing/crystallinity to minimize defects and avoid deep traps, so that effective transfer of charge carriers can take place in the solid state. Excellent results have been reported by blending crystal-forming organic semiconductors with amorphous polymers that serve as binders or passivating agents. We show that, for some molecular structures and processing conditions, mixtures of stereoisomers can separate and self-arrange into a thin amorphous layer covered by a polycrystalline layer. In this work, we focus on two families of constitutional isomers that differ only in the position of the pyridine groups on the π-skeleton and study the effect of the structure on the physical and electrical properties using absorption spectroscopy, AFM, X-ray, and organic field-effect transistor current-voltage response.
AB - Solution processable p- and n-type organic semiconductors are candidates for low-cost, large-area, and roll-to-roll printing of inexpensive mass-production electronics. In these organic semiconductors, it is the π-conjugated backbone that plays the major role in charge-carrier transport across the channel. In order to achieve better device performance, it is required to have better packing/crystallinity to minimize defects and avoid deep traps, so that effective transfer of charge carriers can take place in the solid state. Excellent results have been reported by blending crystal-forming organic semiconductors with amorphous polymers that serve as binders or passivating agents. We show that, for some molecular structures and processing conditions, mixtures of stereoisomers can separate and self-arrange into a thin amorphous layer covered by a polycrystalline layer. In this work, we focus on two families of constitutional isomers that differ only in the position of the pyridine groups on the π-skeleton and study the effect of the structure on the physical and electrical properties using absorption spectroscopy, AFM, X-ray, and organic field-effect transistor current-voltage response.
UR - http://www.scopus.com/inward/record.url?scp=84992718338&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcc.6b06175
DO - 10.1021/acs.jpcc.6b06175
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AN - SCOPUS:84992718338
SN - 1932-7447
VL - 120
SP - 23221
EP - 23229
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 40
ER -