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arXiv 0704.1682cond-mat.mtrl-scicond-mat.mes-hall
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碳纳米管薄膜场发射电流波动的模拟

Modeling the Field Emission Current Fluctuation in Carbon Nanotube Thin Films

N. Sinha, D. Roy Mahapatra, J. T. W. Yeow, R. V. N. Melnik

摘要:

碳纳米管由于其独特的性能,成为场发射器件的理想材料。实验发现,与场发射性能相关的结果显示出可变性。有效的场发射器件的设计需要用系统的和基于多物理场的建模方法来分析可变性。本文通过耦合场发射现象、电子-声子输运和单个孤立碳纳米管的力学,建立了一个薄膜中碳纳米管随机取向的模型。发展了一种计算方案,通过该方案,以时间增量的方式更新碳纳米管的状态。利用场致发射的Fowler-Nordheim方程计算了器件电流,研究了器件尺度下的性能。

英文摘要:

Owing to their distinct properties, carbon nanotubes (CNTs) have emerged as promising candidate for field emission devices. It has been found experimentally that the results related to the field emission performance show variability. The design of an efficient field emitting device requires the analysis of the variabilities with a systematic and multiphysics based modeling approach. In this paper, we develop a model of randomly oriented CNTs in a thin film by coupling the field emission phenomena, the electron-phonon transport and the mechanics of single isolated CNT. A computational scheme is developed by which the states of CNTs are updated in time incremental manner. The device current is calculated by using Fowler-Nordheim equation for field emission to study the performance at the device scale.

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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