{"title":"Design and Characteristics of a Vertical Carbon Nanotube Sheet Field Emitter","authors":"Weiming Zhang, S. Deng, Tianzeng Hong, Yu Zhang","doi":"10.1109/IVNC49440.2020.9203540","DOIUrl":null,"url":null,"abstract":"Vacuum electronics devices require high current and high current density cathode. Carbon nanotube (CNT) cold cathode is a good electron source because of its excellent characteristics. To improve its emission area efficiency and weaken the screen effect, a novel type of vertical CNT sheet was introduced which can be fabricated using laser etching method. In field emission test, a single CNT sheet in micrometer scale can emit 13 mA current and 32.5 A/cm2 current density in pulse mode. The results demonstrated that the vertical CNT sheet has a great potential to be a high current field emitter which may benefit the application of vacuum electronics devices.","PeriodicalId":292538,"journal":{"name":"2020 33rd International Vacuum Nanoelectronics Conference (IVNC)","volume":"128 ","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2020 33rd International Vacuum Nanoelectronics Conference (IVNC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IVNC49440.2020.9203540","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Vacuum electronics devices require high current and high current density cathode. Carbon nanotube (CNT) cold cathode is a good electron source because of its excellent characteristics. To improve its emission area efficiency and weaken the screen effect, a novel type of vertical CNT sheet was introduced which can be fabricated using laser etching method. In field emission test, a single CNT sheet in micrometer scale can emit 13 mA current and 32.5 A/cm2 current density in pulse mode. The results demonstrated that the vertical CNT sheet has a great potential to be a high current field emitter which may benefit the application of vacuum electronics devices.
真空电子器件需要高电流和高电流密度的阴极。碳纳米管冷阴极具有优良的特性，是一种很好的电子源。为了提高碳纳米管的发射面积效率，减弱屏蔽效应，提出了一种新型的垂直碳纳米管片，采用激光刻蚀法制备。在现场发射测试中，单微米尺度的碳纳米管片在脉冲模式下可以发射13 mA电流和32.5 a /cm2电流密度。结果表明，垂直碳纳米管片具有成为大电流场发射极的潜力，有利于真空电子器件的应用。
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