Space Charge Limited Current and Induced Particle Reflection With a Time-Varying Current Injection

被引：4
作者：
Zhu, Ying Bin [1 ,2 ]
Liao, Mei Yan [2 ,3 ]
Yao, Ruo He [2 ,3 ]
机构：
[1] South China Univ Technol, Sch Elect & Informat Engn, Guangdong Key Lab Millimeter Waves & Terahertz, Guangzhou 510006, Peoples R China
[2] South China Univ Technol, Sch Microelect, Guangzhou 510006, Peoples R China
[3] South China Univ Technol, Sch Elect & Informat Engn, Guangzhou 510006, Peoples R China
来源：
IEEE TRANSACTIONS ON ELECTRON DEVICES | 2022年 / 69卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Cathodes; Electric potential; Space charge; Numerical models; Mathematical models; Limiting; Current density; Particle reflection; space charge limited; space charge oscillations; THERMIONIC EMISSION; ELECTRONS; SIMULATION; DENSITY; EMITTER;
D O I：
10.1109/TED.2022.3186868
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Properties of space charge limited current and induced particle reflection with a time-varying current injection are investigated by an efficient grid-free numerical approach. Considering a planar diode with a single-frequency current emitted parallel to the upstream electrode surface, we study the current transmission characteristics between two dc biased electrodes and the influence of current frequency and magnitude on the limiting current first leading to electrons reflection. It is found that on account of the time-varying current injection, the limiting current strongly depends on the current frequency and magnitude, as well as the emission velocity of electrons. For the low-frequency limit, the dc component of the limiting current is approximately equal to half of that obtained from the time-independent model. The limiting current increases monotonically with increasing the frequency, and the dc component has a maximum equal to the limiting current obtained from the time-independent model.
引用
收藏
页码：4460 / 4468
页数：9
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