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Issue 23, 2015
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Enhanced performance in isoindigo based organic small molecule field-effect transistors through solvent additives

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Abstract

Isoindigo based small molecules have attracted much attention in the field of optoelectronic devices due to their broad absorbance and high charge carrier mobilities. Herein, we have investigated the field-effect transistor (FET) characteristics of a series of isoindigo based donor–acceptor–donor (D–A–D) small molecules containing one, two or three thiophene moieties (named IDT, ID2T, and ID3T, respectively) or an ethylenedioxythiophene moiety (IDED). In order to improve the carrier mobility, 1-chloronaphthalene (CN) and 1,8-diiodooctane (DIO) as solvent additives were used. Films were processed with various concentrations of solvent additives and their morphology was examined using atomic force microscopy (AFM). This study provides an understanding of the influence of volatile solvent additives and processing conditions on the morphology of small molecule systems, and serves as a guide to aid in the use of solvent additives in small molecules FET devices.

Graphical abstract: Enhanced performance in isoindigo based organic small molecule field-effect transistors through solvent additives

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Supplementary files

Article information


Submitted
04 Mar 2015
Accepted
11 May 2015
First published
12 May 2015

J. Mater. Chem. C, 2015,3, 5951-5957
Article type
Paper
Author version available

Enhanced performance in isoindigo based organic small molecule field-effect transistors through solvent additives

Y. J. Park, J. H. Seo, W. Elsawy, B. Walker, S. Cho and J. Lee, J. Mater. Chem. C, 2015, 3, 5951
DOI: 10.1039/C5TC00605H

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