Dispersion of High-Purity Semiconducting Arc-Discharged Carbon Nanotubes Using Backbone Engineered Diketopyrrolopyrrole (DPP)-Based Polymers

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The isolation of semiconducting single-walled carbon nanotubes (sc-SWNTs) with ideal diameter and high purity is highly desired for high-performance electronic devices. However, current sorting methods for large-diameter sc-SWNTs suffer from either low purity (<99%) or long processing time (>20 h). Here, a backbone-engineering strategy is reported for the polymer used for sorting to improve the purity of sorted sc-SWNTs. Six diketopyrrolopyrrole (DPP)-based conjugated polymers are used to systematically investigate their sorting ability for sc-SWNTs. It is found that incorporation of more thiophenes building blocks in the repeating units of DPP polymer backbone leads to increased selectivity and yield for sc-SWNTs. The DPP polymers can disperse sc-SWNTs with 1.4-1.6 nm in diameter and high purity of 99.6% by a processing time as short as 1 h. Furthermore, a scalable film coating method named "solution shearing" is used to fabricate SWNT network thin-film transistors (TFTs). The TFT devices exhibit both high mobilities over 50 cm(2) V-1 s(-1) and high on/off ratios over 10(5), which are among the highest performance for solution-processed SWNT network TFTs.
Publisher
WILEY-BLACKWELL
Issue Date
2016-01
Language
English
Article Type
Article
Keywords

THIN-FILM TRANSISTORS; FIELD-EFFECT TRANSISTORS; SELECTIVE DISPERSION; SINGLE-WALL; SOLAR-CELLS; PERFORMANCE; SEPARATION; QUANTIFICATION; EXTRACTION; TRANSPORT

Citation

ADVANCED ELECTRONIC MATERIALS, v.2, no.1

ISSN
2199-160X
DOI
10.1002/aelm.201500299
URI
http://hdl.handle.net/10203/218773
Appears in Collection
MS-Journal Papers(저널논문)
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