Conjugated Polymers with Immolative Side Chains Enable Conductive, Flexible, Transparent Carbon Nanotube Films

IF 7.2 2区材料科学 Q2 CHEMISTRY, PHYSICAL Chemistry of Materials Pub Date : 2024-06-11 DOI:10.1021/acs.chemmater.4c01014

Xiao Yu, and , Alex Adronov*,

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Abstract

Single-walled carbon nanotubes (SWNTs) are promising materials for building transparent conducting films (TCFs). Nevertheless, commercially available SWNTs exhibit low purity and poor solubility. Conjugated polymers (CPs) have been widely reported to disperse SWNTs in organic solvents; however, converting CP-SWNT dispersions into TCFs has never been investigated. In this study, we used the poly(fluorene-co-phenylene) CP with self-immolative linkers (SILs) within its side chains to disperse SWNTs. The SIL enables clean and fast side chain removal from the CP-SWNT complex upon simple treatment with tetra-n-butylammonium fluoride (TBAF) and subsequently decreases the sheet resistance (R_s) of the CP-SWNT thin films. We explored a highly reproducible method to manufacture CP-SWNT-TCFs on a Mylar substrate. All CP-SWNT-TCFs showed a significant decrease in R_s post TBAF treatment, suggesting that eliminating the side chain can decrease R_s while preserving %transmittance. Notably, these CP-SWNT-TCF films exhibited consistent R_s across various bending radii and after 200 bending cycles, highlighting their applicability in flexible electronics. This proof-of-concept study opens up avenues to produce CP-SWNT-TCF and further enhance their electrical conductivity by removing CP side chains.

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具有不溶性侧链的共轭聚合物可制成导电、柔韧、透明的碳纳米管薄膜

单壁碳纳米管（SWNT）是制造透明导电薄膜（TCF）的理想材料。然而，市面上销售的 SWNT 纯度低、溶解性差。据广泛报道，共轭聚合物（CPs）可将 SWNT 分散在有机溶剂中；然而，将 CP-SWNT 分散体转化为 TCF 的研究却从未有过。在本研究中，我们使用在侧链中含有自惰性连接体（SIL）的聚（芴-共亚苯基）氯化石蜡来分散 SWNT。只需用四正丁基氟化铵（TBAF）进行简单处理，SIL 就能将侧链从 CP-SWNT 复合物中干净、快速地去除，从而降低 CP-SWNT 薄膜的薄层电阻（Rs）。我们探索了一种在聚酯薄膜基底上制造 CP-SWNT-TCF 的高重复性方法。经过 TBAF 处理后，所有 CP-SWNT-TCF 的 Rs 都显著降低，这表明消除侧链可以降低 Rs，同时保持透射率。值得注意的是，这些 CP-SWNT-TCF 薄膜在不同的弯曲半径和 200 次弯曲循环后都表现出一致的 Rs，突出了它们在柔性电子产品中的适用性。这项概念验证研究为生产 CP-SWNT-TCF 并通过去除 CP 侧链进一步提高其导电性开辟了道路。

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来源期刊

Chemistry of Materials 工程技术-材料科学：综合

CiteScore

14.10

自引率

5.80%

发文量

929

审稿时长

1.5 months

期刊介绍： The journal Chemistry of Materials focuses on publishing original research at the intersection of materials science and chemistry. The studies published in the journal involve chemistry as a prominent component and explore topics such as the design, synthesis, characterization, processing, understanding, and application of functional or potentially functional materials. The journal covers various areas of interest, including inorganic and organic solid-state chemistry, nanomaterials, biomaterials, thin films and polymers, and composite/hybrid materials. The journal particularly seeks papers that highlight the creation or development of innovative materials with novel optical, electrical, magnetic, catalytic, or mechanical properties. It is essential that manuscripts on these topics have a primary focus on the chemistry of materials and represent a significant advancement compared to prior research. Before external reviews are sought, submitted manuscripts undergo a review process by a minimum of two editors to ensure their appropriateness for the journal and the presence of sufficient evidence of a significant advance that will be of broad interest to the materials chemistry community.