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Centro-Apical Self-Organization of Organic Semiconductors in a Line-Printed Organic Semiconductor: Polymer Blend for One-Step Printing Fabrication of Organic Field-Effect Transistors

Authors
Lee, Su JinKim, Yong-JaeYeo, So YoungLee, EunjiLim, Ho SunKim, MinSong, Yong-WonCho, JinhanLim, Jung Ah
Issue Date
Sep-2015
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v.5
Journal Title
SCIENTIFIC REPORTS
Volume
5
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/147125
DOI
10.1038/srep14010
ISSN
2045-2322
Abstract
Here we report the first demonstration for centro-apical self-organization of organic semiconductors in a line-printed organic semiconductor: polymer blend. Key feature of this work is that organic semiconductor molecules were vertically segregated on top of the polymer phase and simultaneously crystallized at the center of the printed line pattern after solvent evaporation without an additive process. The thickness and width of the centro-apically segregated organic semiconductor crystalline stripe in the printed blend pattern were controlled by varying the relative content of the organic semiconductors, printing speed, and solution concentrations. The centro-apical self-organization of organic semiconductor molecules in a printed polymer blend may be attributed to the combination of an energetically favorable vertical phase-separation and hydrodynamic fluids inside the droplet during solvent evaporation. Finally, a centro-apically phase-separated bilayer structure of organic semiconductor: polymer blend was successfully demonstrated as a facile method to form the semiconductor and dielectric layer for OFETs in one-step.
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