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 cm2 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 language | English |
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Pages (from-to) | 491-498 |
Number of pages | 8 |
Journal | Macromolecular Research |
Volume | 17 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2009 Jul |
Keywords
- Conjugated semiconductor
- Mobility
- Multi-branched molecule
- Organic field effect transistor
- Organic pho-totransistor
ASJC Scopus subject areas
- Chemical Engineering(all)
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry