Kim, Min Je Choi, Jong Yong An, Gukil Kim, Hyunjung Kang, Youngjong Kim, Jai Kyeong Son, Hae Jung Lee, Jung Heon Cho, Jeong Ho Kim, BongSoo 2024-01-20T05:00:29Z 2024-01-20T05:00:29Z 2021-09-04 2016-03 0143-7208 https://pubs.kist.re.kr/handle/201004/124354 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. English ELSEVIER SCI LTD FIELD-EFFECT TRANSISTORS THIN-FILM TRANSISTORS HIGH-MOBILITY SEMICONDUCTING POLYMERS CONJUGATED POLYMERS HIGH HOLE COPOLYMERS TRANSPORT ELECTRON PACKING 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 Article 10.1016/j.dyepig.2015.11.022 1 DYES AND PIGMENTS, v.126, pp.138 - 146 DYES AND PIGMENTS 126 138 146 scie scopus 000370090600017 2-s2.0-84950250553 Chemistry, Applied Engineering, Chemical Materials Science, Textiles Chemistry Engineering Materials Science Article FIELD-EFFECT TRANSISTORS THIN-FILM TRANSISTORS HIGH-MOBILITY SEMICONDUCTING POLYMERS CONJUGATED POLYMERS HIGH HOLE COPOLYMERS TRANSPORT ELECTRON PACKING Organic thin film transistor Low band gap semiconducting polymer High carrier mobility Binary solvent Film crystallinity Thermal annealing