Molecular Design Approach for Directed Alignment of Conjugated Polymers

Kyeongwoon Chung, Da Seul Yang, Woo Hwan Sul, Bong Gi Kim, Jongho Kim, Geunseok Jang, Min Sang Kwon, Maciej Barłóg, Taek Seung Lee, Soo Young Park, Mohammed Al-Hashimi, Jinsang Kim

Research output: Contribution to journalArticle

Abstract

Macroscopic alignment of conjugated polymers (CPs) is essential to fully realize the anisotropic optical and electronic properties of CPs, originated from the one-dimensional -orbital overlap along the conjugated backbone, in the solid-state devices. Various CP-processing approaches to achieve CP alignment have been explored. However, molecular design to enable CP alignment has not been fully understood. Herein, we report a thorough investigation into molecular design parameters critically affecting CP alignment characteristics. First, we present a series of CPs with newly designed building blocks reflecting the previously identified preliminary design principles to validate the general applicability of the identified CP design parameters for alignment. Furthermore, newly defined design factors correlating with CP alignment characteristics are systematically studied, including the planarity of CP main chain, the effect of the side-chain design, intramolecular interaction moiety for induced chain planarity, and the surface energy of CPs. Utilizing aligned CP films, we also demonstrated the optical switching of organic thin-film transistor (OTFT) devices. Depending on the orientation of polarized light illumination, different amounts of photocurrent gain were observed. The on-to-off switching ratio (Ion/Ioff) under illumination was ca. 7.2 × 104, which is large enough for an OTFT to operate by an optical as well as an electrical trigger.

Original languageEnglish
JournalMacromolecules
DOIs
Publication statusAccepted/In press - 1 Jan 2019

Fingerprint

Conjugated polymers
Thin film transistors
Lighting
Solid state devices
Light polarization
Photocurrents
Interfacial energy
Polymer films
Electronic properties
Optical properties
Ions

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Chung, K., Yang, D. S., Sul, W. H., Kim, B. G., Kim, J., Jang, G., ... Kim, J. (Accepted/In press). Molecular Design Approach for Directed Alignment of Conjugated Polymers. Macromolecules. https://doi.org/10.1021/acs.macromol.9b01140

Molecular Design Approach for Directed Alignment of Conjugated Polymers. / Chung, Kyeongwoon; Yang, Da Seul; Sul, Woo Hwan; Kim, Bong Gi; Kim, Jongho; Jang, Geunseok; Kwon, Min Sang; Barłóg, Maciej; Lee, Taek Seung; Park, Soo Young; Al-Hashimi, Mohammed; Kim, Jinsang.

In: Macromolecules, 01.01.2019.

Research output: Contribution to journalArticle

Chung, K, Yang, DS, Sul, WH, Kim, BG, Kim, J, Jang, G, Kwon, MS, Barłóg, M, Lee, TS, Park, SY, Al-Hashimi, M & Kim, J 2019, 'Molecular Design Approach for Directed Alignment of Conjugated Polymers', Macromolecules. https://doi.org/10.1021/acs.macromol.9b01140
Chung, Kyeongwoon ; Yang, Da Seul ; Sul, Woo Hwan ; Kim, Bong Gi ; Kim, Jongho ; Jang, Geunseok ; Kwon, Min Sang ; Barłóg, Maciej ; Lee, Taek Seung ; Park, Soo Young ; Al-Hashimi, Mohammed ; Kim, Jinsang. / Molecular Design Approach for Directed Alignment of Conjugated Polymers. In: Macromolecules. 2019.
@article{c72f5ffd1cc648908c2a7d23a4d9890b,
title = "Molecular Design Approach for Directed Alignment of Conjugated Polymers",
abstract = "Macroscopic alignment of conjugated polymers (CPs) is essential to fully realize the anisotropic optical and electronic properties of CPs, originated from the one-dimensional -orbital overlap along the conjugated backbone, in the solid-state devices. Various CP-processing approaches to achieve CP alignment have been explored. However, molecular design to enable CP alignment has not been fully understood. Herein, we report a thorough investigation into molecular design parameters critically affecting CP alignment characteristics. First, we present a series of CPs with newly designed building blocks reflecting the previously identified preliminary design principles to validate the general applicability of the identified CP design parameters for alignment. Furthermore, newly defined design factors correlating with CP alignment characteristics are systematically studied, including the planarity of CP main chain, the effect of the side-chain design, intramolecular interaction moiety for induced chain planarity, and the surface energy of CPs. Utilizing aligned CP films, we also demonstrated the optical switching of organic thin-film transistor (OTFT) devices. Depending on the orientation of polarized light illumination, different amounts of photocurrent gain were observed. The on-to-off switching ratio (Ion/Ioff) under illumination was ca. 7.2 × 104, which is large enough for an OTFT to operate by an optical as well as an electrical trigger.",
author = "Kyeongwoon Chung and Yang, {Da Seul} and Sul, {Woo Hwan} and Kim, {Bong Gi} and Jongho Kim and Geunseok Jang and Kwon, {Min Sang} and Maciej Barł{\'o}g and Lee, {Taek Seung} and Park, {Soo Young} and Mohammed Al-Hashimi and Jinsang Kim",
year = "2019",
month = "1",
day = "1",
doi = "10.1021/acs.macromol.9b01140",
language = "English",
journal = "Macromolecules",
issn = "0024-9297",
publisher = "American Chemical Society",

}

TY - JOUR

T1 - Molecular Design Approach for Directed Alignment of Conjugated Polymers

AU - Chung, Kyeongwoon

AU - Yang, Da Seul

AU - Sul, Woo Hwan

AU - Kim, Bong Gi

AU - Kim, Jongho

AU - Jang, Geunseok

AU - Kwon, Min Sang

AU - Barłóg, Maciej

AU - Lee, Taek Seung

AU - Park, Soo Young

AU - Al-Hashimi, Mohammed

AU - Kim, Jinsang

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Macroscopic alignment of conjugated polymers (CPs) is essential to fully realize the anisotropic optical and electronic properties of CPs, originated from the one-dimensional -orbital overlap along the conjugated backbone, in the solid-state devices. Various CP-processing approaches to achieve CP alignment have been explored. However, molecular design to enable CP alignment has not been fully understood. Herein, we report a thorough investigation into molecular design parameters critically affecting CP alignment characteristics. First, we present a series of CPs with newly designed building blocks reflecting the previously identified preliminary design principles to validate the general applicability of the identified CP design parameters for alignment. Furthermore, newly defined design factors correlating with CP alignment characteristics are systematically studied, including the planarity of CP main chain, the effect of the side-chain design, intramolecular interaction moiety for induced chain planarity, and the surface energy of CPs. Utilizing aligned CP films, we also demonstrated the optical switching of organic thin-film transistor (OTFT) devices. Depending on the orientation of polarized light illumination, different amounts of photocurrent gain were observed. The on-to-off switching ratio (Ion/Ioff) under illumination was ca. 7.2 × 104, which is large enough for an OTFT to operate by an optical as well as an electrical trigger.

AB - Macroscopic alignment of conjugated polymers (CPs) is essential to fully realize the anisotropic optical and electronic properties of CPs, originated from the one-dimensional -orbital overlap along the conjugated backbone, in the solid-state devices. Various CP-processing approaches to achieve CP alignment have been explored. However, molecular design to enable CP alignment has not been fully understood. Herein, we report a thorough investigation into molecular design parameters critically affecting CP alignment characteristics. First, we present a series of CPs with newly designed building blocks reflecting the previously identified preliminary design principles to validate the general applicability of the identified CP design parameters for alignment. Furthermore, newly defined design factors correlating with CP alignment characteristics are systematically studied, including the planarity of CP main chain, the effect of the side-chain design, intramolecular interaction moiety for induced chain planarity, and the surface energy of CPs. Utilizing aligned CP films, we also demonstrated the optical switching of organic thin-film transistor (OTFT) devices. Depending on the orientation of polarized light illumination, different amounts of photocurrent gain were observed. The on-to-off switching ratio (Ion/Ioff) under illumination was ca. 7.2 × 104, which is large enough for an OTFT to operate by an optical as well as an electrical trigger.

UR - http://www.scopus.com/inward/record.url?scp=85071936424&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85071936424&partnerID=8YFLogxK

U2 - 10.1021/acs.macromol.9b01140

DO - 10.1021/acs.macromol.9b01140

M3 - Article

AN - SCOPUS:85071936424

JO - Macromolecules

JF - Macromolecules

SN - 0024-9297

ER -