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

Su Jin Lee, Yong Jae Kim, So Young Yeo, Eunji Lee, Ho Sun Lim, Min Kim, Yong Won Song, Jinhan Cho, Jung Ah Lim

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

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.

Original languageEnglish
Article number14010
JournalScientific reports
Volume5
DOIs
Publication statusPublished - 2015 Sept 11

Bibliographical note

Funding Information:
This work was supported by the Dream Project (2V03380) and Future Resource Research Program (2E25430) of the Institutional Research Program of the Korea Institute of Science and Technology (KIST). This work was partly supported by the National Research Foundation (NRF) grant funded by the Ministry of Science, ICT & Future Planning (MSIP) (2015R1A2A1A01004354) and Basic Science Research Program (2013R1A1A2061197) through the National Research Foundation of Korea (NRF) funded by the Korea Government (MEST).

ASJC Scopus subject areas

  • General

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