High performance semiconducting polymers containing bis(bithiophenyl dithienothiophene)-based repeating groups for organic thin film transistors
SCIE
SCOPUS
- Title
- High performance semiconducting polymers containing bis(bithiophenyl dithienothiophene)-based repeating groups for organic thin film transistors
- Authors
- Kim, KH; DAE SUNG CHUNG; Park, CE; Choi, DH
- Date Issued
- 2011-01-01
- Publisher
- WILEY-BLACKWELL
- Abstract
- New dithienothiophene-containing conjugated polymers, such as poly(2,6-bis(2-thiopheny1-3-dodecylthiophene-2-yl)dithieno[3,2-b;2',3'-d]thiophene, 4 and poly(2,6-bis (2-thiophenyl-4-dodecylthiophene-2-yl)dithieno[3,2-b;2',3'-d]thiophene, 8 have been successfully synthesized via Stille coupling reactions using dodecyl-substituted thiophene-based monomers, bistributyltin dithienothiophene, and bistributyltin bithiophene; these polymers have been fully characterized. The main difference between the two polymers is the substitution position of the dodecyl side chains in the repeating group. Grazing-incidence X-ray diffraction (GI-XRD) gave clear evidence of edge-on orientation of polycrystallites to the substrate. The semiconducting properties of the two polymers have been evaluated in organic thin film transistors (OTFTs). The two conjugated polymers 4 and 8 exhibit fairly high hole carrier mobilities as high as mu(ave) = 0.05 cm(2)Ns (I-ON/OFF = 3.42 x 10(4)) and mu(ave) = 0.01 cm(2)/Vs, (I-ON/OFF = 1.3 x 10(5)), respectively, after thermal annealing process. The solvent annealed films underwent reorganization of the molecules to induce higher crystallinity. Well-defined atomic force microscopy (AFM) topography supported a significant improvement in TFT device performance. The hole carrier mobilities of the solvent annealed films are comparable to those obtained for a thermally annealed sample, and were one-order higher than those obtained with a pristine sample. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 49: 55-64, 2011
- Keywords
- annealing; charge transport; conjugated polymer; dithienothiophene; mobility; organic thin film transistor; semiconductor; synthesis; thin films; FIELD-EFFECT TRANSISTORS; HIGH-MOBILITY; COPOLYMERS; PENTACENE; OLIGOTHIOPHENES; THIOPHENE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/15570
- DOI
- 10.1002/POLA.24415
- ISSN
- 0887-624X
- Article Type
- Article
- Citation
- JOURNAL OR POLYMER SCIENCE PART A-POLYMER CHEMISTRY, vol. 49, no. 1, page. 55 - 64, 2011-01-01
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