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Carbon nanotubes assisting interchain charge transport in semiconducting polymer thin films towards much improved charge carrier mobility

  • Zhe Zheng (郑哲)
  • Zhenjie Ni (倪振杰)
  • Xiaotao Zhang (张小涛)
  • Yonggang Zhen (甄永刚)
  • Huanli Dong (董焕丽)Email author
  • Jin Zhang (张锦)Email author
  • Wenping Hu (胡文平)Email author
Articles

Abstract

Conjugated polymers attracted much attention in the past few decades due to their wide applications in various optoelectronic devices and circuits. The charge transport process in conjugated polymers mainly occurs in the intrachain and interchain parts, where the interchain charge transport is generally slower than intrachain transport and may slow down the whole charge transport properties. Aiming at this issue, herein we employ semiconducting single-walled carbon nanotubes (s-SWNTs) as efficient charge-transporting jointing channels between conjugated polymer chains for improving the charge transport performance. Taking the typical conjugated polymer, ploy-N-alkyl-diketopyrrolopyrrole- dithienylthieno[3,2-b]thiophene (PDPP-TT) as an example, polymer thin film transistors (PTFTs) based on the optimized blended films of PDPP-TT/s-SWNTs exhibit an obviously increasing device performance compared with the devices based on pure PDPP-TT films, with the hole and electron mobility increased from 2.32 to 12.32 cm2 V−1 s−1 and from 2.02 to 5.77 cm2 V−1 s−1, respectively. This result suggests the importance of forming continuous conducting channels in conjugated polymer thin films, which can also be extended to other polymeric electronic and optoelectronic devices to promote their potential applications in large-area, low-cost and high performance polymeric electronic devices and circuits.

Keywords

conjugated polymer s-SWNTs connected conducting channel carrier mobility 

碳纳米管辅助共轭聚合物薄膜链间载流子传输以提高迁移率

摘要

在过去的几十年中, 共轭聚合物因其在光电器件中的广泛应用受到广泛关注. 共轭聚合物中的电荷传输过程主要由链内和链间两部分组成, 其中链间电荷传输通常低于链内传输, 并且可能降低整个电荷输运性质. 针对该问题, 本文提出了将半导体单壁碳纳米管(s-SWNTs)作为共轭聚合物链间的有效电荷传输通道以改善电荷传输性能的概念. 使用典型的共轭聚合物PDPP-TT作为示例, 将优化的PDPP-TT/s-SWNTs与纯PDPP-TT薄膜的器件相比, 器件性能明显提高, 空穴迁移率从2.32增加到12.32 cm2 V−1 s−1, 而电子迁移率从2.02增加到5.77 cm2 V−1 s−1. 该结果表明在共轭聚合物薄膜中形成连续导电通道的重要性, 此概念也可以扩展到其他聚合物器件中, 以推进其在大面积、 低成本、 高性能聚合物电子器件和电路中的应用.

Notes

Acknowledgements

The authors acknowledge the financial support from the Ministry of Science and Technology of China (2017YFA0204503 and 2016YFB0401100), the National Natural Science Foundation of China (51725304, 51633006, 51703159, 51733004 and 21875259), the Strategic Priority Research Program (XDB12030300) of the Chinese Academy of Sciences and the National Program for Support of Top-notch Young Professionals.

Supplementary material

40843_2018_9388_MOESM1_ESM.pdf (862 kb)
Carbon nanotubes assisting interchain charge transport in semiconducting polymer thin films towards much improved charge carrier mobility

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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Zhe Zheng (郑哲)
    • 1
    • 2
  • Zhenjie Ni (倪振杰)
    • 2
  • Xiaotao Zhang (张小涛)
    • 1
  • Yonggang Zhen (甄永刚)
    • 2
  • Huanli Dong (董焕丽)
    • 2
    Email author
  • Jin Zhang (张锦)
    • 3
    Email author
  • Wenping Hu (胡文平)
    • 1
    • 2
    Email author
  1. 1.Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of ScienceTianjin University and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)TianjinChina
  2. 2.Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of ChemistryChinese Academy of SciencesBeijingChina
  3. 3.Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry and Molecular EngineeringPeking UniversityBeijingChina

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