Nanoscale Vacuum Diode Based on Thermionic Emission for High Temperature Operation
| Autor: | Qiaoning Li, Jinshou Tian, Xiao Wang, Shengli Wu, Zhihua Shen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Fabrication Thermionic emission 02 engineering and technology 01 natural sciences Article law.invention law 0103 physical sciences Miniaturization TJ1-1570 space-charge limited (SCL) current Mechanical engineering and machinery Electrical and Electronic Engineering finite integration technique (FIT) Diode 010302 applied physics nanoscale vacuum diode business.industry Mechanical Engineering 021001 nanoscience & nanotechnology Cathode Anode Field electron emission Control and Systems Engineering Optoelectronics thermionic emission 0210 nano-technology business Voltage |
| Zdroj: | Micromachines Volume 12 Issue 7 Micromachines, Vol 12, Iss 729, p 729 (2021) |
| ISSN: | 2072-666X |
| Popis: | Vacuum diodes, based on field emission mechanisms, demonstrate a superior performance in high-temperature operations compared to solid-state devices. However, when considering low operating voltage and continuous miniaturization, the cathode is usually made into a tip structure and the gap between cathode and anode is reduced to a nanoscale. This greatly increases the difficulty of preparation and makes it difficult to ensure fabrication consistency. Here, a metal-insulator-semiconductor (MIS) structural nanoscale vacuum diode, based on thermionic emission, was numerically studied. The results indicate that this device can operate at a stable level in a wide range of temperatures, at around 600 degrees Kelvin above 260 K at 0.2 V voltage bias. Moreover, unlike the conventional vacuum diodes working in field emission regime where the emission current is extremely sensitive to the gap-width between the cathode and the anode, the emission current of the proposed diode shows a weak correlation to the gap-width. These features make this diode a promising alternative to vacuum electronics for large-scale production and harsh environmental applications. |
| Databáze: | OpenAIRE |
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