Field emission behavior of carbon nanotube field emitters after high temperature thermal annealing

Yuning Sun, Dong Hoon Shin, Ki Nam Yun, Yeon Mo Hwang, Yenan Song, Guillaume Leti, Seok Gy Jeon, Jung Il Kim, Yahachi Saito, Cheol Jin Lee

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The carbon nanotube (CNT) field emitters have been fabricated by attaching a CNT film on a graphite rod using graphite adhesive material. The CNT field emitters showed much improved field emission properties due to increasing crystallinity and decreasing defects in CNTs after the high temperature thermal annealing at 900 °C in vacuum ambient. The CNT field emitters showed the low turn-on electric field of 1.15 V/μm, the low threshold electric field of 1.62 V/μm, and the high emission current of 5.9 mA which corresponds to a current density of 8.5 A/cm2. In addition, the CNT field emitters indicated the enhanced field emission properties due to the multi-stage effect when the length of the graphite rod increases. The CNT field emitter showed good field emission stability after the high temperature thermal annealing. The CNT field emitter revealed a focused electron beam spot without any focusing electrodes and also showed good field emission repeatability.

Original languageEnglish
Article number077110
JournalAIP Advances
Volume4
Issue number7
DOIs
Publication statusPublished - 2014 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Field emission behavior of carbon nanotube field emitters after high temperature thermal annealing'. Together they form a unique fingerprint.

  • Cite this

    Sun, Y., Shin, D. H., Yun, K. N., Hwang, Y. M., Song, Y., Leti, G., Jeon, S. G., Kim, J. I., Saito, Y., & Lee, C. J. (2014). Field emission behavior of carbon nanotube field emitters after high temperature thermal annealing. AIP Advances, 4(7), [077110]. https://doi.org/10.1063/1.4889896