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arXiv 1209.3258cond-mat.mtrl-scicond-mat.mes-hall
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利用混合分子介质实现的碳纳米管薄膜晶体管的基本性能极限

Fundamental Performance Limits of Carbon Nanotube Thin-Film Transistors Achieved Using Hybrid Molecular Dielectrics

Vinod K. Sangwan, Rocio Ponce Ortiz, Justice M. P. Alaboson, Jonathan D. Emery, Michael J. Bedzyk, Lincoln J. Lauhon, Tobin J. Marks, Mark C. Hersam

摘要:

在过去的十年中,半导体碳纳米管薄膜已被公认为在电子、能源和传感领域具有广泛应用的竞争材料。特别是,大面积柔性电子器件的改进已经通过生长后处理的独立进步来实现,以解决金属与半导体碳纳米管的异质性,改善栅极的异质性,以及自组装工艺。此外,特定器件组件的受控调谐提供了材料性质和器件性能指标之间的权衡的基本探测器。尽管如此,碳纳米管晶体管的性能适合于现实世界的应用,等待在独立开创的设备组件集成的理解为基础的进展。我们通过将高纯度半导体碳纳米管薄膜与定制设计的混合无机-有机栅极电介质集成在一起来实现这一目标。这种材料的协同组合避免了传统的设计权衡,导致几种晶体管性能指标的同时进步,例如,介电常数(6.5 μS/μm)、本征场效应迁移率(147 cm^2/Vs)、亚阈值摆幅(150 mV/decade)和开/关比(5 x 10^5),同时还实现了在环境条件下的无介电常数操作。

英文摘要:

In the past decade, semiconducting carbon nanotube thin films have been recognized as contending materials for wide-ranging applications in electronics, energy, and sensing. In particular, improvements in large-area flexible electronics have been achieved through independent advances in post-growth processing to resolve metallic versus semiconducting carbon nanotube heterogeneity, in improved gate dielectrics, and in self-assembly processes. Moreover, controlled tuning of specific device components has afforded fundamental probes of the trade-offs between materials properties and device performance metrics. Nevertheless, carbon nanotube transistor performance suitable for real-world applications awaits understanding-based progress in the integration of independently pioneered device components. We achieve this here by integrating high-purity semiconducting carbon nanotube films with a custom-designed hybrid inorganic-organic gate dielectric. This synergistic combination of materials circumvents conventional design trade-offs, resulting in concurrent advances in several transistor performance metrics such as transconductance (6.5 μS/μm), intrinsic field-effect mobility (147 cm^2/Vs), sub-threshold swing (150 mV/decade), and on/off ratio (5 x 10^5), while also achieving hysteresis-free operation in ambient conditions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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