Bis(2-oxo-7-azaindolin-3-ylidene)benzodifuran-dione-based donor–acceptor polymers for high-performance n-type field-effect transistors

Guobing Zhang; Yanrong Dai; Kuychan Song; Hansol Lee; Feng Ge; Longzhen Qiu; Kilwon Cho

doi:10.1039/C7PY00295E

Bis(2-oxo-7-azaindolin-3-ylidene)benzodifuran-dione-based donor–acceptor polymers for high-performance n-type field-effect transistors†

Guobing Zhang,

^abc Yanrong Dai,^bc Kuychan Song,^a Hansol Lee,^a Feng Ge,^bc Longzhen Qiu

^bc and Kilwon Cho*^a

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* Corresponding authors

^a Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) and Center for Advance Soft Electronics (CASE), Pohang 790-784, South Korea
E-mail: kwcho@postech.ac.kr
Fax: +82-54-279-8291

^b Key Lab of Special Display Technology, Ministry of Education, National Engineering Lab of Special Display Technology, State Key Lab of Advanced Display Technology, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei, China

^c Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Key Laboratory of Advance Functional Materials and Devices, Hefei, Anhui Province, China

Abstract

Two donor–acceptor (D–A) conjugated polymers, PBABDF-DT and PBABDF-TVT, were synthesized using a strongly electron-deficient unit, (3E,7E)-3,7-bis(6-bromo-1-(4-decyltetradecyl)-2-oxo-7-azaindolin-3-ylidene)benzo[1,2-b:4,5-b′]difuran-2,6(3H,7H)-dione (BABDF) as the acceptor, and dithiophene and (E)-2-(2-(thiophen-2-yl)vinyl)thiophene as the donor units. Both polymers exhibited low LUMO energy levels (∼−4.0 eV) for marching with electron transport and displayed excellent n-type charge transport characteristics. The organic field-effect transistors exhibited the highest electron mobilities of 1.86 cm² V⁻¹ s⁻¹ and 1.56 cm² V⁻¹ s⁻¹ with high I_on/I_off ratios of 1.6 × 10⁶ and 1.0 × 10⁶ for PBABDF-DT and PBABDF-TVT, respectively. Both polymers had highly uniform polymer nanofibers, orderly lamellar crystalline structures, and close π–π stacking distances which all contributed to the high charge carrier mobility.

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DOI: https://doi.org/10.1039/C7PY00295E
Article type: Paper
Submitted: 20 Feb 2017
Accepted: 22 Mar 2017
First published: 22 Mar 2017

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Polym. Chem., 2017,8, 2381-2389

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Bis(2-oxo-7-azaindolin-3-ylidene)benzodifuran-dione-based donor–acceptor polymers for high-performance n-type field-effect transistors

G. Zhang, Y. Dai, K. Song, H. Lee, F. Ge, L. Qiu and K. Cho, Polym. Chem., 2017, 8, 2381 DOI: 10.1039/C7PY00295E

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Polymer Chemistry

Bis(2-oxo-7-azaindolin-3-ylidene)benzodifuran-dione-based donor–acceptor polymers for high-performance n-type field-effect transistors†

Abstract

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Bis(2-oxo-7-azaindolin-3-ylidene)benzodifuran-dione-based donor–acceptor polymers for high-performance n-type field-effect transistors

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