Selective Dispersion of Large-Diameter Semiconducting Carbon Nanotubes by Functionalized Conjugated Dendritic Oligothiophenes for Use in Printed Thin Film Transistors

Wei Gao, Wenya Xu, Jun Ye, Tingting Liu, Junkai Wang, Hongwei Tan, Yi Lin, Masayoshi Tange, Dongfeng Sun, Liangzhuan Wu, Toshiya Okazaki, Yingjun Yang, Zhiyong Zhang, Jianwen Zhao*, Zheng Cui, Chang Qi Ma*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Selective dispersion of semiconducting single walled carbon nanotubes (s-SWCNTs) by conjugated polymer wrapping is recognized as the most promising scalable method for s-SWCNT separation. Despite a number of linear conjugated polymers being reported for use in s-SWCNT separation, these linear polymers suffer batch-to-batch variation for their undefined molecular structure. Here, it is reported that conjugated dendritic oligothiophenes with multiple diketopyrrolopyrrole groups at the periphery have the capability of selectively dispersing large diameter s-SWCNTs with high dispersion efficiency and certain chiral selectivity. Printed top-gated thin film transistors using the dendrimer sorted s-SWCNTs show high charge carrier mobility of up to 57 cm2 V−1 s−1 and on/off ratios of ≈106 with high reproducibility, which is ascribed to the defined and monodispersed molecular structure of dendrimers. Moreover, owing to the multiple peripheral anchoring groups of these dendritic molecules, these dendrimer-s-SWCNT dispersions display excellent stability. The current work proves that dendritic molecules are excellent dispersion reagents for s-SWCNT separation.

Original languageEnglish
Article number1703938
JournalAdvanced Functional Materials
Volume27
Issue number44
DOIs
Publication statusPublished - 24 Nov 2017

Keywords

  • dendritic oligothiophenes
  • diketopyrrolopyrrole
  • selective dispersion
  • semiconducting carbon nanotubes
  • stability

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