9,10-Bis(phenylethynyl)anthracene-based organic semiconducting molecules for annealing-free thin film transistors
- Authors
- Bae, Suk Young; Jung, Ki Hwa; Hoang, Mai Ha; Kim, Kyung Hwan; Lee, Tae Wan; Cho, Min Ju; Jin, Jung-Il; Lee, Dong Hoon; Chung, Dae Sung; Park, Chan Eon; Choi, Dong Hoon
- Issue Date
- 5월-2010
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- X-shaped conjugated molecules; Anthracene; Absorption; Semiconductor; Mobility; Organic thin film transistor
- Citation
- SYNTHETIC METALS, v.160, no.9-10, pp.1022 - 1029
- Indexed
- SCIE
SCOPUS
- Journal Title
- SYNTHETIC METALS
- Volume
- 160
- Number
- 9-10
- Start Page
- 1022
- End Page
- 1029
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/116520
- DOI
- 10.1016/j.synthmet.2010.02.020
- ISSN
- 0379-6779
- Abstract
- New anthracene-containing conjugated molecules have been synthesized through Stille coupling reaction. 2,6-Dibromoanthracene-9,10-dione was reacted with ethynylbenzene or 1-ethynyl-4-hexylbenzene to yield 2,6-dibromo-9,10-bis(phenylethynyl)anthracene 4 and 2,6-dibromo-9,10-bis((4-hexylphenyl) ethynyl)anthracene 5. Tributyl(5-hexylthiophen-2-yl)stannane was coupled through Stille reaction to generate two anthracene-based X-shaped molecules. They exhibit good solubility in common organic solvents and good self-film-forming properties. The semiconducting properties of the two molecules were evaluated in organic thin film transistors (OTFTs). Two conjugated molecules 7 and 8 exhibit fairly high charge carrier mobilities-as high as 0.010-0.014 cm(2) V-1 s(-1) (I-on/I-off=1.27 x 10(7) to 4.38 x 10(6)) without thermal annealing process. The X-shaped molecules result in easy crystallization and densely cover the surface of a dielectric layer. This helps in attaining good network interconnection for the carrier transport channel, which is responsible for the relatively high carrier mobility in solution-processed OTFT. (C) 2010 Elsevier B.V. All rights reserved.
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