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Large field emission current and density from robust carbon nanotube cathodes for continuous and pulsed electron sources

连续/脉冲电子源用大电流高密度场发射碳纳米管冷阴极

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Abstract

Highly adhesive cold cathodes with high field emission performance are fabricated by using a screen-printingmethod. The emission density of carbon nanotube (CNT) cold cathode reaches 207.0 mA cm−2 at an electric field of 4.5 V μm−1 under continuous driving mode, and high peak current emission of 315.8 mA corresponding to 4.5 A cm−2 at the electric field of 10.3 V μm−1 under pulsed driving mode. The emission patterns of the cold cathodes are of excellent uniformity that was revealed by vivid luminescent patterns of phosphor coated transparent indium tin oxide (ITO) anode. The cold cathodes also exhibit highly stable emission under continuous and pulsed driving modes. The high adhesion of CNTs tomolybdenum substrates results in robust cold cathodes and is responsible for the high field emission performance. This robust CNT emitter could meet the operating requirements of continuous and pulsed electron sources, and it provides promising applications in various vacuummicro/nanoelectronic devices.

摘要

本文采用丝网印刷技术制备了具有高粘接性能的碳纳米管冷阴极. 该碳纳米管冷阴极在直流连续及脉冲场下均具有优异的场发射 性能, 同时具有高发射电流密度与发射总电流, 可以满足高功率器件对冷阴极电子源的使用需求. 在直流连续场下, 该冷阴极的电流发射 密度可达到207.0 mA cm−2 (电场强度为4.5 V μm−1);在脉冲场(200 Hz, 10 μs)激发下, 峰值电流密度最高可达4.5 A cm−2(电场强度为10.3 V μm−1), 同时具有高的峰值发射电流(315.8 mA). 为观察阴极发射均匀性, 采用荧光板为阳极进行实时监测, 发现此印刷阴极发射较均一; 稳 定性测试表明该阴极在连续及脉冲场下均具有良好的发射稳定性. 该冷阴极同时具有高电流密度及高发射电流, 可以满足高功率真空电 子器件的使用要求, 在真空微纳电子器件中显示出巨大的应用前景.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (51002161) and One-Three-Five Strategic Planning of Chinese Academy of Sciences.

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Authors and Affiliations

  1. Laboratory of Clean Energy Chemistry andMaterials, State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China

    Jiangtao Chen  (陈江涛), Bingjun Yang  (杨兵军), Xiahui Liu  (刘夏辉), Juan Yang  (杨娟), Linfan Cui  (崔琳凡) & Xingbin Yan  (阎兴斌)

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  1. Jiangtao Chen  (陈江涛)
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  2. Bingjun Yang  (杨兵军)
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  3. Xiahui Liu  (刘夏辉)
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  4. Juan Yang  (杨娟)
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  5. Linfan Cui  (崔琳凡)
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  6. Xingbin Yan  (阎兴斌)
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Corresponding author

Correspondence to Xingbin Yan  (阎兴斌).

Additional information

Jiangtao Chen received his PhD degree in condensed matter physics from the School of Physical Science & Technology, Lanzhou University in 2009. He is now an associate professor at Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences (CAS). His research interest focuses on the preparation and application of carbon nanomaterials (carbon nanotubes, graphene and carbon quantum dots) for field emission and optoelectronic devices.

Xingbin Yan received his PhD degree in physical chemistry from LICP, CAS in 2005. Then he worked at Nanyang Technological University as a research fellow and the University of Lyon as a postdoctoral researcher. He is now the director of the Laboratory of Clean Energy Chemistry and Materials, LICP, CAS. His research group works on energy storage devices including supercapacitors and rechargeable batteries. For details, please see the lab website: www.licp.cas.cn/yxbz.

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40843_2016_9016_MOESM1_ESM.pdf

Large field emission current and density from robust carbon nanotube cathodes for continuous and pulsed electron sources

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Chen, J., Yang, B., Liu, X. et al. Large field emission current and density from robust carbon nanotube cathodes for continuous and pulsed electron sources. Sci. China Mater. 60, 335–342 (2017). https://doi.org/10.1007/s40843-016-9016-5

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  • DOI: https://doi.org/10.1007/s40843-016-9016-5

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