New semiconducting multi-branched conjugated molecules bearing 3,4-ethylene- dioxythiophene-based thiophenyl moieties for organic field effect transistor

Dae Chulr Kim, Tae Wanr Lee, Jung Eunr Lee, Kyung Hwanr Kim, Min Jur Cho, Dong Hoon Choi, Yoon Deokr Han, Mi Yeonr Cho, Jinsoo Joo

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

New φ-conjugated multi-branched molecules were synthesized through the Homer-Emmons reaction using alkyl-substituted, 3,4-ethylenedioxythiophene-based, thiophenyl aldehydes and octaethyl benzene-1,2,4,5- tetrayltetrakis(methylene) tetraphosphonate as the core unit; these molecules have all been fully characterized. The two multi-branched conjugated molecules exhibited excellent solubility in common organic solvents and good self- film forming properties. The semiconducting properties of these multi-branched molecules were also evaluated in organic field-effect transistors (OFET). With octyltrichlorosilane (OTS) treatment of the surface of the Si02 gate insulator, two of the crystalline conjugated molecules, 7 and 8, exhibited carrier mobilities as high as 2.4 (± 0.5)*10 -3 and 1.3 (± 0.5)xl0 -3 cm 2 V -1s -1, respectively. The mobility enhancement of OFET by light irradiation (γ = 436 ran) supported the promising photo-controlled switching behavior for the drain current of the device.

Original languageEnglish
Pages (from-to)491-498
Number of pages8
JournalMacromolecular Research
Volume17
Issue number7
Publication statusPublished - 2009 Jul 1

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Bearings (structural)
Organic field effect transistors
Ethylene
Molecules
Drain current
Carrier mobility
Benzene
Aldehydes
Organic solvents
Solubility
ethylene
Irradiation
Crystalline materials

Keywords

  • Conjugated semiconductor
  • Mobility
  • Multi-branched molecule
  • Organic field effect transistor
  • Organic pho-totransistor

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics
  • Chemical Engineering(all)

Cite this

New semiconducting multi-branched conjugated molecules bearing 3,4-ethylene- dioxythiophene-based thiophenyl moieties for organic field effect transistor. / Kim, Dae Chulr; Lee, Tae Wanr; Lee, Jung Eunr; Kim, Kyung Hwanr; Cho, Min Jur; Choi, Dong Hoon; Han, Yoon Deokr; Cho, Mi Yeonr; Joo, Jinsoo.

In: Macromolecular Research, Vol. 17, No. 7, 01.07.2009, p. 491-498.

Research output: Contribution to journalArticle

Kim, Dae Chulr ; Lee, Tae Wanr ; Lee, Jung Eunr ; Kim, Kyung Hwanr ; Cho, Min Jur ; Choi, Dong Hoon ; Han, Yoon Deokr ; Cho, Mi Yeonr ; Joo, Jinsoo. / New semiconducting multi-branched conjugated molecules bearing 3,4-ethylene- dioxythiophene-based thiophenyl moieties for organic field effect transistor. In: Macromolecular Research. 2009 ; Vol. 17, No. 7. pp. 491-498.
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