Abstract
New dithienothiophene-containing conjugated polymers, such as poly(2,6-bis(2-thiophenyl-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 μave = 0.05 cm 2/Vs (ION/OFF = 3.42 × 104) and μave = 0.01 cm2/Vs, (ION/OFF = 1.3 × 105), 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.
| Original language | English |
|---|---|
| Pages (from-to) | 55-64 |
| Number of pages | 10 |
| Journal | Journal of Polymer Science, Part A: Polymer Chemistry |
| Volume | 49 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2011 Jan 1 |
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Keywords
- annealing
- charge transport
- conjugated polymer
- dithienothiophene
- mobility
- organic thin film transistor
- semiconductor
- synthesis
- thin films
ASJC Scopus subject areas
- Materials Chemistry
- Polymers and Plastics
- Organic Chemistry
Cite this
High performance semiconducting polymers containing bis(bithiophenyl dithienothiophene)-based repeating groups for organic thin film transistors. / Kim, Kyung Hwan; Chung, Dae Sung; Park, Chan Eon; Choi, Dong Hoon.
In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 49, No. 1, 01.01.2011, p. 55-64.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - High performance semiconducting polymers containing bis(bithiophenyl dithienothiophene)-based repeating groups for organic thin film transistors
AU - Kim, Kyung Hwan
AU - Chung, Dae Sung
AU - Park, Chan Eon
AU - Choi, Dong Hoon
PY - 2011/1/1
Y1 - 2011/1/1
N2 - New dithienothiophene-containing conjugated polymers, such as poly(2,6-bis(2-thiophenyl-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 μave = 0.05 cm 2/Vs (ION/OFF = 3.42 × 104) and μave = 0.01 cm2/Vs, (ION/OFF = 1.3 × 105), 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.
AB - New dithienothiophene-containing conjugated polymers, such as poly(2,6-bis(2-thiophenyl-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 μave = 0.05 cm 2/Vs (ION/OFF = 3.42 × 104) and μave = 0.01 cm2/Vs, (ION/OFF = 1.3 × 105), 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.
KW - annealing
KW - charge transport
KW - conjugated polymer
KW - dithienothiophene
KW - mobility
KW - organic thin film transistor
KW - semiconductor
KW - synthesis
KW - thin films
UR - http://www.scopus.com/inward/record.url?scp=78649816168&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78649816168&partnerID=8YFLogxK
U2 - 10.1002/pola.24415
DO - 10.1002/pola.24415
M3 - Article
AN - SCOPUS:78649816168
VL - 49
SP - 55
EP - 64
JO - Journal of Polymer Science, Part A: Polymer Chemistry
JF - Journal of Polymer Science, Part A: Polymer Chemistry
SN - 0887-624X
IS - 1
ER -