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High-Performance Hole Transport and Quasi-Balanced Ambipolar OFETs Based on D–A–A Thieno-benzo-isoindigo Polymers

James, David Ian; Wang, Suhao; Ma, Wei; Hedström, Svante LU ; Meng, Xiangyi; Persson, Petter LU ; Fabiano, Simone; Crispin, Xavier; Andersson, Mats R. and Berggren, Magnus, et al. (2016) In Advanced Electronic Materials 2(4).
Abstract

Two new conjugated polymers are synthesized based on a novel donor–acceptor–acceptor (D–A–A) design strategy with the intention of attaining lower lowest unoccupied molecular obital levels compared to the normally used D–A strategy. By coupling two thieno-benzo-isoindigo units together via the phenyl position to give a new symmetric benzene-coupled di-thieno-benzo-isoindigo (BdiTBI) monomer as an A–A acceptor and thiophene (T) or bithiophene (2T) as a donor, two new polymers PT-BdiTBI and P2T-BdiTBI are synthesized via Stille coupling. The two polymers are tested in top gate and top contact field effect transistors, which exhibit balanced ambipolar charge transport properties with poly(methyl methacrylate) as dielectric and a high hole... (More)

Two new conjugated polymers are synthesized based on a novel donor–acceptor–acceptor (D–A–A) design strategy with the intention of attaining lower lowest unoccupied molecular obital levels compared to the normally used D–A strategy. By coupling two thieno-benzo-isoindigo units together via the phenyl position to give a new symmetric benzene-coupled di-thieno-benzo-isoindigo (BdiTBI) monomer as an A–A acceptor and thiophene (T) or bithiophene (2T) as a donor, two new polymers PT-BdiTBI and P2T-BdiTBI are synthesized via Stille coupling. The two polymers are tested in top gate and top contact field effect transistors, which exhibit balanced ambipolar charge transport properties with poly(methyl methacrylate) as dielectric and a high hole mobility up to 1.1 cm2 V–1 s–1 with poly(trifluoroethylene) as dielectric. The polymer films are investigated using atomic force microscopy, which shows fibrous features due to their high crystallinity as indicated by grazing incidence wide-angle X-ray scattering. The theoretical calculations agree well with the experimental data on the energy levels. It is demonstrated that the D–A–A strategy is very effective for designing low band gap polymers for organic electronic applications.

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published
subject
keywords
ambipolar, conjugated polymers, donor–acceptor–acceptor strategy, high mobility, organic field effect transistors
in
Advanced Electronic Materials
volume
2
issue
4
publisher
Wiley-VCH Verlag
external identifiers
  • scopus:84986244244
ISSN
2199-160X
DOI
10.1002/aelm.201500313
language
English
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yes
id
13042d02-5416-45d3-a864-b7c3b5b57559
date added to LUP
2018-05-24 13:19:11
date last changed
2018-12-02 05:01:09
@article{13042d02-5416-45d3-a864-b7c3b5b57559,
  abstract     = {<p>Two new conjugated polymers are synthesized based on a novel donor–acceptor–acceptor (D–A–A) design strategy with the intention of attaining lower lowest unoccupied molecular obital levels compared to the normally used D–A strategy. By coupling two thieno-benzo-isoindigo units together via the phenyl position to give a new symmetric benzene-coupled di-thieno-benzo-isoindigo (BdiTBI) monomer as an A–A acceptor and thiophene (T) or bithiophene (2T) as a donor, two new polymers PT-BdiTBI and P2T-BdiTBI are synthesized via Stille coupling. The two polymers are tested in top gate and top contact field effect transistors, which exhibit balanced ambipolar charge transport properties with poly(methyl methacrylate) as dielectric and a high hole mobility up to 1.1 cm<sup>2</sup> V<sup>–1</sup> s<sup>–1</sup> with poly(trifluoroethylene) as dielectric. The polymer films are investigated using atomic force microscopy, which shows fibrous features due to their high crystallinity as indicated by grazing incidence wide-angle X-ray scattering. The theoretical calculations agree well with the experimental data on the energy levels. It is demonstrated that the D–A–A strategy is very effective for designing low band gap polymers for organic electronic applications.</p>},
  articleno    = {1500313},
  author       = {James, David Ian and Wang, Suhao and Ma, Wei and Hedström, Svante and Meng, Xiangyi and Persson, Petter and Fabiano, Simone and Crispin, Xavier and Andersson, Mats R. and Berggren, Magnus and Wang, Ergang},
  issn         = {2199-160X},
  keyword      = {ambipolar,conjugated polymers,donor–acceptor–acceptor strategy,high mobility,organic field effect transistors},
  language     = {eng},
  month        = {04},
  number       = {4},
  publisher    = {Wiley-VCH Verlag},
  series       = {Advanced Electronic Materials},
  title        = {High-Performance Hole Transport and Quasi-Balanced Ambipolar OFETs Based on D–A–A Thieno-benzo-isoindigo Polymers},
  url          = {http://dx.doi.org/10.1002/aelm.201500313},
  volume       = {2},
  year         = {2016},
}