Gate-induced superconductivity in a solution-processed organic polymer film
Gate-induced superconductivity in a solution-processed organic polymer film
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DOI：
10.1038/35065565
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发表时间：
2001-03
期刊：
影响因子：
64.8
通讯作者：
J. Schön;Ananth Dodabalapur;Zhenan Bao;C. Kloc;O. Schenker;B. Batlogg;B. Batlogg
中科院分区：
文献类型：
--
作者：
J. Schön;Ananth Dodabalapur;Zhenan Bao;C. Kloc;O. Schenker;B. Batlogg;B. Batlogg
共轭聚合物的电学和光学性质在传统金属和无机半导体的潜在低成本替代品的背景下受到了相当大的关注。在这些有机材料中的电荷输运的特点是在掺杂的金属和半导体状态，，在这里，我们报告了一个独特的金属-绝缘体过渡和金属水平的导电性聚合物场效应晶体管。活性材料是溶液浇铸的区域规则的聚（3-己基噻吩），其由于自组织而形成相对良好有序的膜，并且其在室温下产生高的电荷载流子迁移率（0.05-0.1 cm 2 V-1 s-1）。当温度低于2.35K，面载流子密度超过2.5 × 10 ~（14）cm ~（-2）时，聚噻吩薄膜变为超导。超导电性的出现似乎与聚合物的自组装性质密切相关，因为发现引入额外的无序会抑制超导电性。因此，我们的研究结果表明，在尽可能大的范围内（从绝缘到超导）调整共轭聚合物的电性能是可行的。
The electrical and optical properties of conjugated polymers have received considerable attention in the context of potentially low-cost replacements for conventional metals and inorganic semiconductors. Charge transport in these organic materials has been characterized in both the doped-metallic and the semiconducting state,,,, but superconductivity has not hitherto been observed in these polymers. Here we report a distinct metal–insulator transition and metallic levels of conductivity in a polymer field-effect transistor. The active material is solution-cast regioregular poly(3-hexylthiophene), which forms relatively well ordered films owing to self-organization, and which yields a high charge carrier mobility (0.05–0.1 cm2V-1s-1) at room temperature. At temperatures below ∼2.35 K with sheet carrier densities exceeding 2.5 × 1014cm-2, the polythiophene film becomes superconducting. The appearance of superconductivity seems to be closely related to the self-assembly properties of the polymer, as the introduction of additional disorder is found to suppress superconductivity. Our findings therefore demonstrate the feasibility of tuning the electrical properties of conjugated polymers over the largest range possible—from insulating to superconducting.