Photoreactive π-conjugated star-shaped molecules for the organic field-effect transistor

Mai Ha Hoang, Min Ju Cho, Dae Cheol Kim, Kyung Hwan Kim, Ji Won Shin, Mi Yeon Cho, Jinsoo Joo, Dong Hoon Choi

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A number of semiconducting organic molecules capable of wet processing exhibit high carrier mobility and current modulation. In this work, we synthesized photopatternable π-conjugated star-shaped molecules and characterized their physical properties. The solubility of the synthesized molecules is very good for solution processing. The synthesized organic semiconducting multi-branched molecules are capable of photopatterning by virtue of photopolymerization of the reactive pentadienyl end groups. The transistor devices using these molecules provided a field-effect mobility of 1.3(±0.2) × 10-3-3.7(±0.5) × 10-3 cm2 V-1 s-1 as well as a high current on/off ratio (Ion/off > 103) and a low threshold voltage. In the case of the photoreactive star-shaped conjugated molecule HP2P, it was found that field-effect mobility was maintained even after the photocrosslinking process. This result can be used in the design of photopatternable semiconductor molecules for thin-film transistor electronic applications.

Original languageEnglish
Pages (from-to)607-617
Number of pages11
JournalOrganic Electronics: physics, materials, applications
Volume10
Issue number4
DOIs
Publication statusPublished - 2009 Jul 1

Fingerprint

Organic field effect transistors
Stars
field effect transistors
stars
Molecules
molecules
transistors
Photopolymerization
Carrier mobility
Thin film transistors
Processing
carrier mobility
Threshold voltage
threshold voltage
low voltage
high current
Transistors
solubility
Solubility
Physical properties

Keywords

  • Carrier mobility
  • Organic field-effect transistor
  • Photoreactive
  • Star-shaped molecule

ASJC Scopus subject areas

  • Biomaterials
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Electrical and Electronic Engineering
  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Photoreactive π-conjugated star-shaped molecules for the organic field-effect transistor. / Hoang, Mai Ha; Cho, Min Ju; Kim, Dae Cheol; Kim, Kyung Hwan; Shin, Ji Won; Cho, Mi Yeon; Joo, Jinsoo; Choi, Dong Hoon.

In: Organic Electronics: physics, materials, applications, Vol. 10, No. 4, 01.07.2009, p. 607-617.

Research output: Contribution to journalArticle

Hoang, Mai Ha ; Cho, Min Ju ; Kim, Dae Cheol ; Kim, Kyung Hwan ; Shin, Ji Won ; Cho, Mi Yeon ; Joo, Jinsoo ; Choi, Dong Hoon. / Photoreactive π-conjugated star-shaped molecules for the organic field-effect transistor. In: Organic Electronics: physics, materials, applications. 2009 ; Vol. 10, No. 4. pp. 607-617.
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