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A new rigid planar low band gap PTTDPP-DT-DTT polymer for organic transistors and performance improvement through the use of a binary solvent system

Title
A new rigid planar low band gap PTTDPP-DT-DTT polymer for organic transistors and performance improvement through the use of a binary solvent system
Authors
Kim, Min JeChoi, Jong YongAn, GukilKim, HyunjungKang, YoungjongKim, Jai KyeongSon, Hae JungLee, Jung HeonCho, Jeong HoKim, BongSoo
Ewha Authors
김봉수
SCOPUS Author ID
김봉수scopus
Issue Date
2016
Journal Title
DYES AND PIGMENTS
ISSN
0143-7208JCR Link1873-3743JCR Link
Citation
vol. 126, pp. 138 - 146
Keywords
Organic thin film transistorLow band gap semiconducting polymerHigh carrier mobilityBinary solventFilm crystallinityThermal annealing
Publisher
ELSEVIER SCI LTD
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We report the synthesis of a new low band gap planar polymer of poly(2,5-bis(2-decyltetradecyl)-3-(5-(dithieno[3,2-b:2',3'-d]thiophen-2-yl)thieno[3,2-b]thiophen-2-y1)-6-(thieno[3,2-b]thiophen-2-y1)-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione) (PTTDPP-DT-DTT) for use in organic thin film transistors (OTFTs). The polymer backbone is highly planar and well-conjugated, facilitating interchain stacking. The PTTDPP-DT-DTT-based OTFTs were fabricated and carrier mobilities were improved by using a binary solvent system: chloroform (CF):toluene (Tol), CF:chlorobenzene (CB), and CF:o-dichlorobenzene (DCB). The addition of higher boiling point solvents promoted film crystallinity with more edge-on orientations. Thus, the use of CF:DCB yielded the highest carrier mobility obtained among the devices tested. Thermal annealing further enhanced the mobility of the CF:DCB device. Atomic force microscopy images disclosed the most fibrous feature in the thermally annealed polymer film cast from CF:DCB solution. This work highlights that both the proper selection of a binary solvent and thermal annealing can manage film morphology of rigid planar conjugated polymer semiconductors effectively for high-performance OTFTs. (C) 2015 Elsevier Ltd. All rights reserved.
DOI
10.1016/j.dyepig.2015.11.022
Appears in Collections:
사범대학 > 과학교육과 > Journal papers
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