A stand-alone flat-plane lighting device in a diode structure employing highly crystalline SWCNTs as field emitters

Shimoi, Norihiro; Abe, Daisuke; Tanaka, Yasumitsu; Tohji, Kazuyuki

doi:10.1016/j.diamond.2016.03.015

Cited by 7 publications

(1 citation statement)

References 24 publications

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“…As a result, ITO films were obtained from each type SWCNT, which were used as cathode plates. In addition, to facilitate field emission, the sintered ITO film with dispersed SWCNTs was scratched to activate the film surface and obtain stable FE properties [25]. Figure 1 shows (a) a schematic diagram of SWCNTs that were protruding from a scratched groove, (b) a scanning electron microscopy (SEM, SU-8000, Hitachi High-Technologies Corporation, Tokyo, Japan) overview after activating the FE for the ITO film, including metallic SWCNTs, and (c) an enlarged view of the protruding SWCNTs in the circled region of (b).…”

Section: Methodsmentioning

confidence: 99%

Current-Fluctuation Mechanism of Field Emitters Using Metallic Single-Walled Carbon Nanotubes with High Crystallinity

Shimoi

Tohji

2017

Applied Sciences

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Field emitters can be used as a cathode electrode in a cathodoluminescence device, and single-walled carbon nanotubes (SWCNTs) that are synthesized by arc discharge are expected to exhibit good field emission (FE) properties. However, a cathodoluminescence device that uses field emitters radiates rays whose intensity considerably fluctuates at a low frequency, and the radiant fluctuation is caused by FE current fluctuation. To solve this problem, is very important to obtain a stable output for field emitters in a cathodoluminescence device. The authors consider that the electron-emission fluctuation is caused by Fowler-Nordheim electron tunneling and that the electrons in the Fowler-Nordheim regime pass through an inelastic potential barrier. We attempted to develop a theoretical model to analyze the power spectrum of the FE current fluctuation using metallic SWCNTs as field emitters, owing to their electrical conductivity by determining their FE properties. Field emitters that use metallic SWCNTs with high crystallinity were successfully developed to achieve a fluctuating FE current from field emitters at a low frequency by employing inelastic electron tunneling. This paper is the first report of the successful development of an inelastic-electron-tunneling model with a Wentzel-Kramers-Brillouin approximation for metallic SWCNTs based on the evaluation of FE properties.

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Section: Methodsmentioning

confidence: 99%