New Semiconducting Multi-branched Conjugated Molecules Bearing 3,4-Ethylenedioxythiophene-based Thiophenyl Moieties for Organic Field Effect Transistor
- Authors
- Kim, Dae Chul; Lee, Tae Wan; Lee, Jung Eun; Kim, Kyung Hwan; Cho, Min Ju; Choi, Dong Hoon; Han, Yoon Deok; Cho, Mi Yeon; Joo, Jin-soo
- Issue Date
- 7월-2009
- Publisher
- SPRINGER
- Keywords
- conjugated semiconductor; multi-branched molecule; mobility; organic field effect transistor; organic phototransistor
- Citation
- MACROMOLECULAR RESEARCH, v.17, no.7, pp.491 - 498
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- MACROMOLECULAR RESEARCH
- Volume
- 17
- Number
- 7
- Start Page
- 491
- End Page
- 498
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/119773
- DOI
- 10.1007/BF03218897
- ISSN
- 1598-5032
- Abstract
- New pi-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 SiO2 gate insulator, two of the crystalline conjugated molecules, 7 and 8, exhibited carrier mobilities as high as 2.4 (+/-0.5) x 10(-3) and 1.3 (+/-0.5) x 10(-3) cm(2)V(-1)s(-1) respectively. The mobility enhancement of OFET by light irradiation (lambda = 436 nm) supported the promising photo-controlled switching behavior for the drain current of the device.
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Collections - College of Science > Department of Chemistry > 1. Journal Articles
- College of Science > Department of Physics > 1. Journal Articles
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