Selective dispersion of high purity semiconducting single-walled carbon nanotubes with regioregular poly(3-alkylthiophene)s
Selective dispersion of high purity semiconducting single-walled carbon nanotubes with regioregular poly(3-alkylthiophene)s
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DOI：
10.1038/ncomms1545
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发表时间：
2011-11-01
影响因子：
16.6
通讯作者：
Bao, Zhenan
中科院分区：
文献类型：
--
作者：
Lee, Hang Woo;Yoon, Yeohoon;Bao, Zhenan
共轭聚合物，如聚芴和聚苯乙烯，已被用于选择性分散半导体单壁碳纳米管（sc-SWNTs），但这些聚合物在晶体管和太阳能电池中的应用有限。区域规则聚（3-烷基噻吩）s （r - p3ats）是应用最广泛的有机电子材料，已被观察到包裹在单壁碳纳米管上。然而，sc- swcnts的分选在此之前尚未实现。本文报道了rr- p3at在sc- swcnts分选中的应用。通过合理选择聚合物、溶剂和温度，实现了sc- swcnts的高选择性分散。我们的方法可以在简单的离心步骤后直接制备膜。利用分选的sc-SWNT，我们制造了高性能的SWNT网络晶体管，观察到的电荷载流子迁移率高达12 cm(2)V(-1)s(-1)，开/关比为bbb10(6)。我们的方法为sc- swnt的分离和电子器件的制造提供了一种方便和可扩展的途径。
Conjugated polymers, such as polyfluorene and poly(phenylene vinylene), have been used to selectively disperse semiconducting single-walled carbon nanotubes (sc-SWNTs), but these polymers have limited applications in transistors and solar cells. Regioregular poly(3-alkylthiophene)s (rr-P3ATs) are the most widely used materials for organic electronics and have been observed to wrap around SWNTs. However, no sorting of sc-SWNTs has been achieved before. Here we report the application of rr-P3ATs to sort sc-SWNTs. Through rational selection of polymers, solvent and temperature, we achieved highly selective dispersion of sc-SWNTs. Our approach enables direct film preparation after a simple centrifugation step. Using the sorted sc-SWNTs, we fabricate high-performance SWNT network transistors with observed charge-carrier mobility as high as 12 cm(2)V(-1)s(-1) and on/off ratio of > 10(6). Our method offers a facile and a scalable route for separating sc-SWNTs and fabrication of electronic devices.