Pulse Field Emission Characteristics of Vertical Few-Layer Graphene Cold Cathode
Pulse Field Emission Characteristics of Vertical Few-Layer Graphene Cold Cathode
复制标题
立式少层石墨烯冷阴极脉冲场发射特性
DOI:
10.1109/ted.2014.2304452
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发表时间:
2014-02
影响因子:
3.1
通讯作者:
Xu, Ningsheng
中科院分区:
文献类型:
--
作者:
Zhang, Yu;Deng, Deliu;Zhu, Lijun;Deng, Shaozhi;Chen, Jun;Xu, Ningsheng
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-μs 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.
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