• 文献标题:   Pulse Field Emission Characteristics of Vertical Few-Layer Graphene Cold Cathode
  • 文献类型:   Article
  • 作  者:   ZHANG Y, DENG DL, ZHU LJ, DENG SZ, CHEN J, XU NS
  • 作者关键词:   electron emission, field emitter, graphene, pulsing operation
  • 出版物名称:   IEEE TRANSACTIONS ON ELECTRON DEVICES
  • ISSN:   0018-9383 EI 1557-9646
  • 通讯作者地址:   Sun Yat Sen Univ
  • 被引频次:   6
  • DOI:   10.1109/TED.2014.2304452
  • 出版年:   2014

▎ 摘  要

Vertical few-layer graphene (FLG) is an excellent field emission material, with an atomically thin edge and a 2-D heat dissipation area. A pulse voltage driving operation was used to achieve a high field emission current. The pulsewidth and duty ratio affected the field emission characteristics of the FLG due to the current heating effect. The optimal pulse parameters were obtained. A maximum current of 32 mA in 3-mu s pulsing operation was achieved from a 5-mm diameter FLG film, which was 10 times greater than the maximum current achieved in continuous current operation. The current fluctuation was 4.1%. A method for further increasing the emission current is proposed.