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首页> 外文期刊>Journal of Vacuum Science & Technology. B, Microelectronics and Nanometer Structures >Description of field emission current/voltage characteristics in terms of scaled barrier field values (f-values)
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Description of field emission current/voltage characteristics in terms of scaled barrier field values (f-values)

机译：用按比例的势垒场值（f值）描述场发射电流/电压特性

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The scaled barrier field f is defined as the local field F that determines a field emission tunneling barrier, divided by the critical field needed to reduce to zero a barrier initially of height (for F=0) equal to the local work-function. The description of field emission current-voltage (I—V) characteristics is more universal, and closer to theory, if measured voltages are reassigned as f-values. This paper describes a simple method for directly converting voltage to f-value, using the slope of a Fowler-Nordheim plot of type ln{I/ V~2} vs 1 / V. A short table of characteristic f-values could be helpful for describing typical emission features such as the emission onset, the onset of emitter degradation, or the onset of space-charge effects. For an old-style metal field emitter of moderate to large apex radius, a table based on the systematic work of Dyke and Trolan [Phys. Rev. 89, 799 (1953)] is given. Tables of this kind, if prepared for different categories of field emitter, could be helpful in emitter comparisons. In another use, different individual emitters in emitter arrays can be thought of as operating at different f-values. The use of f-values seems a simple, additional helpful way of describing field emitter behavior, particularly in technological contexts.
机译：缩放后的势垒场f定义为确定场发射隧穿势垒的局域F，除以将初始高度（对于F = 0）等于局域功函的势垒减小到零所需的临界场。如果将测量电压重新分配为f值，则对场发射电流-电压（IV）特性的描述更为通用，并且更接近理论。本文使用ln {I / V〜2}类型的Fowler-Nordheim图的斜率与1 / V的斜率，描述了一种直接将电压转换为f值的简单方法。简短的特征f值表可能会有所帮助用于描述典型的发射特征，例如发射开始，发射极退化的开始或空间电荷效应的开始。对于中等半径到较大顶点半径的老式金属场发射器，可以使用基于Dyke和Trolan [Phys。 Rev. 89，799（1953）]。如果为不同类别的场发射器准备了此类表格，则可能有助于进行发射器比较。在另一种用途中，可以认为发射器阵列中的不同单个发射器在不同的f值下工作。 f值的使用似乎是描述场发射器行为的一种简单，额外的有用方法，尤其是在技术环境中。

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